The correct answer is (a). Arunachal Pradesh is one of the least densely populated states in India, with a population density of just 10 people per square kilometer. This is due to a number of factors, including the state’s mountainous terrain, which makes it difficult to access, and its remote location, which has historically made it difficult for people to settle there. As a result, Arunachal Pradesh remains a largely rural state, with most of its population living in small villages.
Option (b) is incorrect because the population density of Arunachal Pradesh is actually much lower than 17 people per square kilometer. Option (c) is incorrect because the population density of Arunachal Pradesh is actually much lower than 50 people per square kilometer. Option (d) is incorrect because the population density of Arunachal Pradesh is actually much lower than 100 people per square kilometer.