Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Knowledge Indian Geography Indian Economic and Human Geography
About 80% of the coal reserves of India lie in the
1
Damodar valley
2
Son valley
3
Mahanadi valley
4
More than one of the above
5
None of the above