The correct answer is Raipur.
Raipur is the capital of Chhattisgarh and the most populous district in the state. It has a population density of 1,038 people per square kilometer.
Durg is the second most populous district in Chhattisgarh, with a population density of 804 people per square kilometer.
Bilaspur is the third most populous district in Chhattisgarh, with a population density of 634 people per square kilometer.
Korba is the fourth most populous district in Chhattisgarh, with a population density of 488 people per square kilometer.
Raipur is a major industrial and commercial center. It is also home to a number of educational institutions, including the University of Raipur.
Durg is a major industrial and mining center. It is also home to a number of educational institutions, including the National Institute of Technology, Durg.
Bilaspur is a major educational and cultural center. It is also home to a number of industries, including steel and cement production.
Korba is a major coal mining center. It is also home to a number of industries, including steel and power generation.