Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Geography (World Geography) Geomorphology
Which one of the given below is most abundant element of earth's crust ____.
1
Oxygen(O)
2
Silicon(Si)
3
Aluminium(Al)
4
More than one of the above
5
None of the above