Stony endocarp is present in:

Step-by-step solution

In mango and coconut, the fruit is known as a drupe. They develop from monocarpellary superior ovaries and are one-seeded. In mango, the pericarp is well-differentiated into an outer thin epicarp, a middle fleshy edible mesocarp and an inner stony hard endocarp. In coconut, which is also a drupe, the mesocarp is fibrous.