It is known that exposure to carbon monoxide is harmful to animals because
(a) It reduces CO2 transport
(b) It reduces O2 transport
(c) It increases CO2 transport
(d) It increases O2 transport
The answer is the option (b) It reduces O2 transport
Explanation: - Exposure to carbon monoxide is harmful to animals because it leads to transport of less oxygen. Carbon monoxide binds with the haemoglobin of the blood, thus leaving oxygen behind. The cells, not being able to respire thus and cannot live for a long time.