Concept: This question tests your understanding of fruit types, specifically the characteristics of a drupe, and the specific features of mango and coconut fruits.

Why (D) is correct:

(i) In both mango and coconut, the fruit is a drupe. A drupe is a fleshy fruit with a hard, stony endocarp (pit) enclosing the seed.

(iii) The mesocarp (middle layer of the fruit wall) in coconut is fibrous (coir), which helps in buoyancy for water dispersal. In mango, the mesocarp is fleshy and edible.

(iv) Both mango and coconut fruits develop from a monocarpellary ovary (an ovary formed from a single carpel).

Why other options are wrong:

(ii) Endocarp is edible in neither. In mango, the endocarp is the hard, stony pit. In coconut, the endocarp is the hard shell surrounding the 'meat' (endosperm).

Common Mistake: Students often confuse the edible part of the coconut (endosperm) with the endocarp or mesocarp.

NEET Tip: Remember the key characteristics of a drupe: fleshy mesocarp, stony endocarp. Think of examples like peach, plum, cherry, mango, and coconut.

Correct Answer: (D)