The correct answer is: Sirpur.
Sirpur was the capital of the Panduvamshi dynasty, which ruled the region of Chhattisgarh from the 6th to the 10th centuries CE. The city was located on the banks of the Mahanadi River and was a major center of trade and culture. It is known for its many temples, which are some of the finest examples of early Indian architecture.
Raipur is the current capital of Chhattisgarh. It is a modern city with a population of over 1 million people. The city is home to a number of government offices and educational institutions.
Rajim is a town in Chhattisgarh that is known for its temples and pilgrimage sites. The town is located on the banks of the Mahanadi River and is a popular tourist destination.
Bhilai is a city in Chhattisgarh that is known for its steel industry. The city is located on the banks of the Hasdeo River and is a major industrial center.