The correct answer is a) East Sikkim.
East Sikkim is the most populous district in Sikkim, with a population of 438,985 as of 2011. It is located in the eastern part of the state and is bordered by Nepal to the north, Bhutan to the east, West Bengal to the south, and South Sikkim to the west. The district is home to the capital city of Gangtok, as well as the towns of Namchi, Mangan, and Ravangla.
East Sikkim is a mountainous district with a diverse landscape. The northern part of the district is home to the Kanchenjunga National Park, which is home to the third-highest mountain in the world, Kanchenjunga. The southern part of the district is home to the Teesta River, which is the main river in Sikkim.
East Sikkim is a popular tourist destination, with attractions such as the Nathula Pass, the Yumthang Valley, and the Tsomgo Lake. The district is also home to a number of monasteries, including the Rumtek Monastery and the Enchey Monastery.
Here is a brief description of each option:
- a) East Sikkim is the most populous district in Sikkim, with a population of 438,985 as of 2011. It is located in the eastern part of the state and is bordered by Nepal to the north, Bhutan to the east, West Bengal to the south, and South Sikkim to the west. The district is home to the capital city of Gangtok, as well as the towns of Namchi, Mangan, and Ravangla.
- b) West Sikkim is the second most populous district in Sikkim, with a population of 286,923 as of 2011. It is located in the western part of the state and is bordered by Nepal to the north, Bhutan to the east, South Sikkim to the south, and East Sikkim to the west. The district is home to the towns of Kalimpong, Pelling, and Jorethang.
- c) North Sikkim is the third most populous district in Sikkim, with a population of 172,308 as of 2011. It is located in the northern part of the state and is bordered by Nepal to the north, Bhutan to the east, East Sikkim to the south, and West Sikkim to the west. The district is home to the towns of Lachen, Lachung, and Mangan.
- d) South Sikkim is the least populous district in Sikkim, with a population of 128,459 as of 2011. It is located in the southern part of the state and is bordered by West Bengal to the south, East Sikkim to the west, and Nepal to the north. The district is home to the towns of Namchi, Ravangla, and Soreng.