Which specific physiographic subdivision of Chhattisgarh is primarily formed by the upper basin of the Mahanadi River and constitutes the central plains of the state?

💡 Solution & Explanation

The Chhattisgarh Plain, also known as the Mahanadi Basin, forms the central agricultural heartland of the state and is bounded by the Maikal Hills to the west and the Chota Nagpur plateau extensions to the north. Other regions like the Bastar Plateau are situated further south with distinct undulating topography and tribal settlements. The Mahanadi River along with its major tributaries drains this fertile lowland zone.