Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Biology Ecology & Environment
Which of the following chemical compound causes Bio-magnification?
1
Sulphur dioxide
2
D.D.T
3
Methane
4
More than one of the above
5
None of the above