Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Knowledge Indian Geography Indian Economic and Human Geography
Which one of the following river valleys is most important in respect of coal reserves of the Gondwana period?
1
The Son river valley
2
Mahanadi river valley
3
Damodar river valley
4
More than one of the above
5
None of the above