The correct option is A Stony endocarp
Drupe (or stone fruit) is an indehiscent fruit in which an outer fleshy part (exocarp or skin and mesocarp or flesh) surrounds a shell (the pit, stone or pyrene) of hardened endocarp (stony endocarp) with a seed (kernel) inside. These fruits usually develop from a single carpel and mostly from flowers with superior ovaries (polypyrenous drupes are exceptions). The definitive characteristic of a drupe is that the hard, lignified stone is derived from the ovary wall of the flower. In an aggregate fruit composed of small, individual drupes, each individual is termed as a drupelet. So, drupe contains stony endocarp and edible mesocarp.
Thus, the correct answer is option A.