Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Basic Science and Engineering Environment Education
The main minerals constituting the continental mass are
1
Silica and Alumina.
2
Silica and Magnesium
3
Nickel and Iron
4
More than one of the above
5
None of the above