Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Knowledge Geography (World Geography) Geomorphology
The main minerals of oceanic crust are:
(A) Magnesium
(B) Alumina
(C) Silica
(D) Nickel
1
Only (A)
2
Only (B) and (C)
3
Only (A) and (C)
4
More than one of the above
5
None of the above