Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Knowledge Geography (World Geography) Biogeography
Which among the following Chemical component is not a major component in the black soil?
1
Phosphorous
2
Iron oxide
3
Magnesium carbonates
4
More than one of the above
5
None of the above