Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Biology Ecology & Environment
Why Carbon Monoxide is a pollutant ?
1
Reacts with haemoglobin
2
Makes nervous system inactive
3
It reacts with Oxygen
4
More than one of the above
5
None of the above