Question

(a) both A and R are true and R is 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.
1. Assertion(A): Food, clothes, medicines and books are all based on the versatile element Carbon.
Reason(R): In case of oxygen, we see the formation of a double bond between two oxygen atoms.
2. Assertion(A): Principal focus for convex lens is a real point.
Reason(R): Rays incident parallel to the principal axis of a convex lens actually converge at the focus point.

Answer 1

Explanation:

b Both A & R true but R is explanation of A