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 :

The correct answer is Option C (2 and 3) because Statements 2 and 3 are geographically incorrect, whereas Statement 1 is factually true.

• Statement 1 is correct: Uttar Pradesh shares its boundary with the highest number of administrative units in India. It borders eight states (Uttarakhand, Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, and Bihar) and one Union Territory (Delhi).
• Statement 2 is incorrect: West Bengal, not Rajasthan, shares the longest international border among all Indian states. West Bengal's total international boundary is approximately 2,509 km long. The vast majority of this (about 2,217 km) is shared with Bangladesh, alongside shorter borders with Bhutan and Nepal. In contrast, Rajasthan shares an international border of approximately 1,070 km with Pakistan, which is significantly shorter.
• Statement 3 is incorrect: Sikkim is not the only Indian state that shares its domestic boundary with just one other state. There are exactly two such states in India: Sikkim (which borders exclusively with West Bengal) and Meghalaya (which borders exclusively with Assam).

Key Takeaway: When studying Indian political geography, watch out for absolute words like "only" in UPSC statements. Remember India's two "single-neighbor" states (Sikkim and Meghalaya) and note that West Bengal holds the longest international boundary primarily due to its highly irregular, meandering border with Bangladesh.