Question

Indicate the edible part in
(i) Cashew nut
(ii) Litchi
(iii) Mango
(iv) Apple
(v) Grape
(vi) Banana.

Answer 1

Exotic fruits are defined as fruits which are not native and that are cultivated outside, available at their place of origin. Many of the exotic fruits are tropical. Fruits are defined as the mature ovary or ovaries of one or more flowers. The mesocarp is usually the fleshy, edible part of the fruit. In most of all the fruits, two, or all three of the layers are fused, and are indistinguishable at maturity.

Complete answer:

Fruits	Edible parts
Cashew nut	Cotyledon
Litchi	Fleshy aril

Fruits are classified as dry or fleshy. The pericarp develops from a plant's ovary. It forms around the seeds. On fruit, the pericarp is the edible tissue that develops around the seeds. Pericarp is the outermost edible layer of the fruit that develops from the wall of the ovary. It consists of Epicarp, Mesocarp, and Endocarp.
Now let is see the edible parts of different fruits:

Cashew nut: the cashew nut is only a seed and not a true fruit . It is a dicotyledonous and its edible part is its cotyledons. It is usually a modification of thalamus.
Litchi : an aril is defined as the outgrowth that arises from seed and sometimes covers partially and sometimes fully the seed. The edible part of the litchi is therefore aril.
Mango: The edible and eating part of the mango is its sweet, juicy pulp which is anatomically the mesocarp of fruit. The word mesocarp is derived from 'meso' meaning middle and 'carp' i.e. fruit. It encloses the seed which is not edible.
Apple : when we eat fleshy fruit such as apples the edible part is not ripened ovary but the hypanthium tissue. It is a false fruit and the edible part is receptacle or can be said as thalamus.
Grape : A berry is a kind of fleshy fruit that is produced from a single flower and usually contains one ovary. Grapes is one of the most common examples. The berry is the most occurring type of fleshy fruit in which the entire ovary wall ripens into an edible pericarp.
Banana : This is a false fruit and can be called as parthenocarpic fruit. This type of fruit is formed without fertilisation. The edible part is endocarp and mesocarp.

Note:
Fruits are eaten for obtaining a balanced diet .Different fruits have different edible parts. It depends on the growth they perform. In many fruits pericarp is the edible part as in grape. There are usually three layers: endocarp, mesocarp and pericarp.