Assertion (A): The inner walls of the small intestine have finger like projections called villi which are rich in blood. (1 Mark) (2023) Reason (R): These villi have a large surface area to help the small intestine in completing the digestion of food. (a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true and (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.