The correct option is D Mesocarp
Coir is a versatile natural fiber extracted from mesocarp tissue or husk of the coconut fruit. Generally fiber is of golden color when cleaned after removing from coconut husk and hence, the name the Golden Fiber. Coir is a natural fiber extracted from the husk of coconut and used in products such as floor mats, doormats, brushes, mattresses, etc.
Coir is the fibrous material found between the hard, internal shell and the outer coat of a coconut. Coir fibers are found between the hard, internal shell (endocarp) and the outer coat of a coconut (epicarp).
Coir is not obtained from endocarp, epicarp or any part of fruit.
Therefore, the correct answer is option B.