The correct answer is: A. 398 per sq. km
According to the 2011 census, the population density of Assam is 398 per sq. km. This means that there are 398 people living in every square kilometer of Assam. This is higher than the national average of 382 people per sq. km. The population density of Assam is highest in the Brahmaputra Valley, where the majority of the state’s population lives. The population density is lowest in the hill districts of Assam.
The population density of a state is an important indicator of its development. A high population density can lead to problems such as overcrowding, pollution, and traffic congestion. However, it can also lead to economic development, as it creates a large market for goods and services.
The population density of Assam has been increasing over the past few decades. This is due to a number of factors, including natural population growth, migration from other states, and the expansion of agriculture. The increasing population density of Assam is putting a strain on the state’s resources, such as land, water, and energy. The state government is taking steps to address these challenges, such as investing in infrastructure and promoting sustainable development.