The correct option is
A A- 3, B- 4, C- 2, D- 1
Endosperm is a tissue produced inside the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This can make endosperm a source of nutrition in human diet. For example, wheat endosperm is ground into flour for bread (the rest of the grain is included as well in whole wheat flour), while barley endosperm is the main source for beer production.
Other examples of endosperm that forms the bulk of the edible portion are coconut meat and coconut water and corn. When other accessory floral parts contribute to the formation of fruit, then such fruits are called as false fruits or pseudocarp.
In apple, the thalamus grows around the pericarp to produce the fleshy edible part.
In orange and lemons the edible part is juicy placental hair. The mesocarp is the middle layer of the pericarp between the exocarp and endocarp.
In mango, the mesocarp is the edible, fleshy portion that is eaten between the skin and the seed.
Thus, the correct answer is option A.