Question

The fruit of coconut is
(a)Drupe
(b)Hesperidium
(c)Composite fruits
(d)Berry

Answer 1

Hint: Coconuts are known as single-seeded fibrous fruits. It is a fruit with rough stony seed covering (like a peach or olive). The coconut fruit is named for the Greek term meaning olive overripe.

Complete answer:
Drupe originates from the Greek word drupa. A coconut, similar to other drupes, has three layers, the exocarp, the mesocarp, and the endocarp.
A drupe is often considered a stone fruit. It is an indehiscent fruit which consists of an external fleshy part identified as the exocarp, or the skin and mesocarp or flesh surrounds a shell of hard endocarp with a seed inside. Typically these fruits arise from a single carpel, and also from superior ovary flowers.
Hesperidium is a multi-chambered, seeded fleshy fruit created from the multidisciplinary, synchronous, and superior ovary. The epicarp is thin and smooth, e.g. lemons and oranges are leathery and glandular.
Berry is a fleshy, edible Pericarp fruit. While being known as a "vegetable," tomato is a botanical fruit known as a berry.
A composite or multiple fruits are a group of fruitlets that grow out of the various inflorescence flowers. Pineapple is an example of a composite fruit.

So, the correct answer is, ‘Drupe’.

Note: A drupe's definitive feature is that the rough, lignified stone (or pit) is derived from the floral ovary wall. The coconut mesocarp is fibrous or dry (called a husk), hence this type of fruit is known as a drupe, simple dry fruit, and fibrous drupe. Unlike other drupes, because of their large size, the coconut seed is unlikely to be spread by or eaten by fauna. But it can float incredibly long distances through oceans.