Aril is the edible portion of which one of the following?

Aril is the accessory covering of certain seeds that commonly develops from the seed stalk.
It is found in both angiosperms and gymnosperms.
It is often a bright-colored fleshy envelope.
The fleshy edible part of litchi is that fleshy plant structure that may be a modification of the outer layer of the episperm referred to as episperm.
The fleshy edible part of litchi is the fleshy aril which is a modification of the outer layer of the seed coat known as a testa.
The outer covering is made of pericarp and the thalamus is not involved in the formation of fruit.