Q. 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:
(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 3 only

Answer : C

Explanation:

Statement I is correct: Uttar Pradesh shares its border with 9 states/union territories (highest). More specifically, it shares its border with Uttarakhand, Himachal Pradesh, Haryana, Delhi, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand and Bihar.
Statement II is not correct: West Bengal has the longest international boundary. India and Bangladesh share a 4,096 km-long international border, the fifth-longest land border in the world, with West Bengal having the highest length of 2,217 km.
Statement III is not correct: Sikkim shares a border with only West Bengal. However, Meghalaya also shares a border with only one Indian state (Assam). So Sikkim is not the only one.

Source: https://www.mapsofindia.com/