List of top Agroforestry Questions on water asked in CUET (PG)

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R 
Assertion: Freshwater wetlands produce methane due to complete decomposition of organic matter.
Reason R: Methane concentration has more than doubled, since its concentration during the pre-industrial times.
In the light of above statements, choose the correct answer from the options given below