Consider the following statements:Assertion (A) : Unlike temperate forests, the tropical rain forests, if cleared,can yield productive farmland that can support intensive agriculture for several years even without chemical fertilizers.Reason (R) : The primary productivity of the tropical rain forest is very high when compared to that of temperate forests.In the context of above two statements, Which one of the following is correct ?

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true