Assertion (A) : Carbon dioxide is one of the important greenhouse gases.
Reson (R) : It is largely produced by respiratory function of animals and plants.

Assertion (A) : Excess amount of CO , in air is responsible for green house effect. Reason (R) : CO_(2) is largely produced in respiratory functions.

Assertion: Carbon dioxide is one of the main constituent of greenhouse gases. Reason: In pregent woman increased CO level induced premature birth, spontaneous abortion and deformed birth.