Assertion (A): Greenhouse effect was observed in houses used to grow plants and these are made of green glass. Reason (R): Greenhouse name has been given because glasshouses are made of green glass. (i) Both A and R are correct and R is the correct explanation of A. (ii) Both A and R are correct but R is not the correct explanation of A. (iii) Both A and R are not correct. (iv) A is not correct but R is correct.