Which of the following with reference to Indian States is/are not correct ? 1. Uttar Pradesh shares its boundary with the highest number of other Indian States. 2. Rajasthan shares the longest international border among all Indian States. 3. Sikkim is the only State that shares its boundary with just one other Indian State. Select the answer using the code given below :

Updated 3 Oct 2026

Contents12
UPSC Prelims GS2026Geography
  1. A1 only
  2. B1 and 2
  3. C2 and 3
  4. D3 only
Show answer

Answer: (C) 2 and 3

The correct answer is 2 and 3.

Key Points

  • Statement 1 is correct. Uttar Pradesh touches the most Indian States — eight (Uttarakhand, Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand and Bihar) — plus one Union Territory, Delhi.
  • Statement 2 is incorrect. The longest international border of any Indian State belongs to West Bengal — about 2,217 km with Bangladesh. Rajasthan's international border with Pakistan is only about 1,037 km.
  • Statement 3 is incorrect. Sikkim is not the only such State. Meghalaya also shares its land border with just one Indian State, Assam.

Additional Information

  • Sikkim: its only domestic border is with West Bengal in the south. Internationally it is surrounded by Bhutan, Tibet (China) and Nepal.
  • Meghalaya: bounded by Assam in the north and east, and by Bangladesh in the south and west.
  • The Radcliffe Line is the India–Pakistan boundary, affecting States such as Gujarat, Rajasthan and Punjab.
  • The McMahon Line is the effective China–India boundary, mainly along Arunachal Pradesh.
  • Assam comes next after Uttar Pradesh in domestic connectivity, sharing borders with seven Indian States.
Why this was asked

Uttar Pradesh borders eight states (the most of any Indian state), West Bengal has India's longest international border at about 2,217 km with Bangladesh, and both Sikkim and Meghalaya share borders with only one other Indian state each.

This tests precise knowledge of India's interstate boundaries and international borders, which requires memorizing exact border lengths and neighboring state counts.

The question uses common misconceptions as traps - students often assume largest states like Rajasthan have longest borders, or that small northeastern states like Sikkim are unique in their limited connectivity.

Indian States Domestic Border Connectivity

Geography Uttar Pradesh Sikkim Meghalaya States

Indian States Domestic Border Connectivity: Maximum & Minimum Sharing

Must know

Uttar Pradesh shares borders with 8 Indian States — the maximum

Sikkim and Meghalaya each border only 1 Indian State

Good to know

Assam comes second with 7 state borders

Why This Matters

Border connectivity affects administration, trade, and resource sharing between states. UPSC tests which states have maximum or minimum domestic connections.

States by Border Connectivity

State

Number of Borders

Neighboring States

Special Note

Uttar Pradesh

8

Uttarakhand, Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, Bihar

Also touches Delhi (UT)

Assam

7

Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, West Bengal

Gateway to Northeast

Sikkim

1

West Bengal

Surrounded by China, Nepal, Bhutan

Meghalaya

1

Assam

Also borders Bangladesh internationally

State Boundaries Map

Political map of India showing state boundaries with Uttar Pradesh, Sikkim, and Meghalaya highlighted to show their border connections

Uttar Pradesh in central India touches 8 states, while Sikkim and Meghalaya are isolated with single domestic borders

Exam traps

Trap: Students forget Meghalaya also borders only one state — not just Sikkim

Trap: Delhi is a UT, not a state — so UP touches 8 states + 1 UT

Trap: Assam has 7 borders (second highest) but students may confuse with UP's count

International Borders of Indian States

Geography Rajasthan West Bengal international border Bangladesh

International Borders: Which Indian State Has the Longest?

Must know

West Bengal has the longest international border — 2,217 km with Bangladesh

Rajasthan has 1,037 km with Pakistan — not the longest

Good to know

India-Bangladesh border is 4,096 km total across 5 states

Border Significance

International border length affects security, trade, and cross-border movement. West Bengal has India's longest state-level international border due to Bangladesh's geography.

States with Longest International Borders

State

Neighboring Country

Border Length

Border Name

West Bengal

Bangladesh

2,217 km

Part of Radcliffe Line legacy

Rajasthan

Pakistan

1,037 km

Radcliffe Line

Arunachal Pradesh

China

1,126 km

McMahon Line

Jammu & Kashmir

Pakistan, China

1,216 km total

LOC + LAC

India-Bangladesh Border Details

5 states share border with Bangladesh: West Bengal, Assam, Meghalaya, Tripura, Mizoram

West Bengal alone accounts for 54% of total India-Bangladesh border

This border has highest enclave density — creates administrative challenges

Exam traps

Trap: Rajasthan seems obvious due to size, but West Bengal has the longest international border

Trap: Don't confuse total border length with international border length

Trap: Jammu & Kashmir has long borders but split between Pakistan and China

Major International Boundary Lines

Geography Radcliffe Line McMahon Line

Radcliffe Line & McMahon Line: India's Key International Boundaries

Must know

Radcliffe Line separates India from Pakistan — drawn in 1947

McMahon Line is India-China boundary in Arunachal Pradesh

Good to know

Both lines create ongoing territorial disputes

Major Boundary Lines Comparison

Boundary

Countries

Length

Created

Status

Radcliffe Line

India-Pakistan

3,323 km

1947 (Partition)

International border

McMahon Line

India-China

1,126 km

1914 (Simla Accord)

Disputed by China

Durand Line

Pakistan-Afghanistan

2,640 km

1893

Not involving India directly

States Affected by These Lines

Radcliffe Line states: Gujarat, Rajasthan, Punjab, Jammu & Kashmir

McMahon Line: Primarily Arunachal Pradesh, some parts of Himachal Pradesh

West Bengal border with Bangladesh is Radcliffe Line legacy but often treated separately

Boundary Lines Map

Radcliffe Line (west) and McMahon Line (northeast) define India's most sensitive international boundaries
Radcliffe Line (west) and McMahon Line (northeast) define India's most sensitive international boundaries

Source: Britannica — Radcliffe Line | Indo-Pak Border, Partition of India, & Indian Independence Movement | Britannica · www.britannica.com

Exam traps

Trap: McMahon Line is disputed by China, not accepted as official border

Trap: Durand Line is Pakistan-Afghanistan, not India's direct concern