Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Indian Geography Indian Economic and Human Geography
The minerals closest to the bottom of the earth's surface can only be excavated by the _______ process.
1
Drilling
2
Quarrying
3
Shaft Mining
4
More than one of the above
5
None of the above