Q. Consider the following:

1. Jharia Coal Fields
2. Korba Coal Fields
3. Umaria Coal Fields

The correct representation of the states in which they are located are as follows:
Answer: Jharkhand, Chhattisgarh, Madhya Pradesh
Notes: Jharia Coal Fields Jharia, which is the largest coal field of India, is located in Jharkhand. It lies in Damodar Valley and spreads in 280 km². Its main production is bituminous coke for production of coke. It supplies most of the coal produced in India. It is also known for a coal field fire that burnt for around a century. Korba Coal Fields Korba Coalfield is located in Korba district of Chhattisgarh. It is located in the basis of Hasdeo River, which is a tributary of the Mahanadi. The Gevra mine is one of the mines in Korba Coal fileds which is considered to be the largest open cast mine in India. The coal from the Korba coal field supports Korba Super Thermal Power Plant of NTPC. Umaria Coal Fields Umaria coal field is located in  Umaria district of Madhya Pradesh in the Umrer River valley, which is a  tributary of the Son River.