The correct answer is (c), Andaman and Nicobar.
Andaman and Nicobar is a union territory of India in the Bay of Bengal. It is the largest union territory in India by area, but the least populous. The population density of Andaman and Nicobar is 38 people per square kilometer, which is much lower than the national average of 464 people per square kilometer.
The low population density of Andaman and Nicobar is due to a number of factors, including its remote location, its tropical climate, and its mountainous terrain. The territory is also home to a number of indigenous tribes, who have traditionally lived in isolation from the outside world.
The low population density of Andaman and Nicobar has both positive and negative implications. On the positive side, it means that the territory has a relatively pristine environment. On the negative side, it means that the territory has a limited infrastructure and a small economy.
The government of India has been working to develop Andaman and Nicobar in recent years. The territory has seen an increase in tourism, and the government has invested in infrastructure projects such as roads, airports, and power plants. However, the territory remains one of the most remote and underdeveloped parts of India.