Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Indian Geography Indian Economic and Human Geography
Which of these is regarded as the superior quality of coal?
1
Bituminous
2
Metallurgical
3
Anthracite
4
More than one of the above
5
None of the above