The correct answer is: b) Tawang
Tawang district is a district in the Indian state of Arunachal Pradesh. It is located in the eastern part of the state, bordering Bhutan to the north and China (Tibet) to the east. The district headquarters is Tawang town.
Tawang is a mountainous district with a high altitude. The highest peak in the district is Gorichen Peak, which is 7,194 meters (23,590 feet) high. The district is also home to the Tawang Monastery, which is one of the largest Buddhist monasteries in India.
Tawang district is a popular tourist destination. The main attractions of the district are the Tawang Monastery, the Gorichen Peak, and the Sela Pass.
The other options are incorrect because:
- West Kameng district does not border China (Tibet).
- East Kameng district does not border Bhutan.
- Upper Siang district does not border China (Tibet).