Assertion (A): Unlike temperate forests, the tropical rain forests, if cleared, can yield productive farm-land 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 the temperate forests.

1. (a)Both A and R are individually true and R is the correct explanation of A
2. (b)Both A and R are individually true but R is NOT the correct explanation of A
3. (c)A is true but R is false
4. (d)A is false but R is true