Which of the following parts are used for the development of fruit in mango and coconut?

Step-by-step solution

Drupe fruits are also called stone fruits because comparatively hard seed is developed inside the fruit. This fruit is usually single seeded. In mango and coconut, this drupe fruit is formed by monocarpellary (single carpel), superior ovary (hypogynous flower) and are usually one seeded. Polycarpellary ovary is usually form compound fruit.