UP Districts: Analyzing Boundaries with Only One Neighbor

The question asks us to identify which district(s) among Lalitpur, Saharanpur, and Sonbhadra share their boundary with *exactly one* other district located within Uttar Pradesh.

District Boundary Analysis

Let's examine the boundaries of each listed district:

• Lalitpur: This district is situated in the southwestern part of Uttar Pradesh. Internally within Uttar Pradesh, Lalitpur shares its boundary only with the Jhansi district. It also shares boundaries with the state of Madhya Pradesh on three sides. Therefore, Lalitpur borders only one other district of Uttar Pradesh.
• Saharanpur: Located in the northwestern corner of Uttar Pradesh, Saharanpur shares its boundaries with two districts of Uttar Pradesh: Muzaffarnagar and Bijnor. It also borders the states of Haryana, Uttarakhand, and Himachal Pradesh. Therefore, Saharanpur borders two other districts of Uttar Pradesh.
• Sonbhadra: Situated in the southeastern region of Uttar Pradesh, Sonbhadra is known for bordering multiple states. Internally within Uttar Pradesh, it shares boundaries with Mirzapur, Chandauli, and Varanasi districts. It also borders Madhya Pradesh, Chhattisgarh, Jharkhand, and Bihar. Therefore, Sonbhadra borders three other districts of Uttar Pradesh.

Identifying the Correct Option

Based on the analysis:

• Lalitpur borders 1 UP district.
• Saharanpur borders 2 UP districts.
• Sonbhadra borders 3 UP districts.

The condition is to find the district(s) bordering *only one* other district of Uttar Pradesh. Only Lalitpur (District 1) meets this criterion.

Therefore, the correct option is the one that includes 'Only 1'.