The correct answer is: a) East Sikkim.
East Sikkim is the most populous district in Sikkim, with a population density of 250 people per square kilometer. This is significantly higher than the population density of the other districts in Sikkim, which are all below 100 people per square kilometer.
There are several reasons for the high population density in East Sikkim. First, the district is home to the capital city of Gangtok, which is the largest city in Sikkim. Second, East Sikkim is a major agricultural region, and the district is home to a large number of farmers. Third, East Sikkim is a popular tourist destination, and the district is home to a number of hotels and resorts.
The high population density in East Sikkim has a number of implications. First, it puts a strain on the district’s infrastructure, such as its roads, water supply, and electricity supply. Second, it can lead to environmental problems, such as deforestation and pollution. Third, it can lead to social problems, such as crime and poverty.
The government of Sikkim is taking a number of steps to address the challenges posed by the high population density in East Sikkim. These steps include investing in infrastructure, promoting sustainable development, and providing social services to the poor.