Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Biology Biology in Everyday life
Which of the following is the largest source of Nitrogen?
1
Atmospheric Nitrogen
2
Urban Waste
3
Livestock and Poultry operations
4
More than one of the above
5
None of the above