In coconut, black covering (thin layer) adherent to the kernel around the endosperm is

Milky water of tender coconut is

Assertion : Endosperm is a nutritive tissue and it is triploid.
Reason: Endosperm is formed by fusion of secondary nucleus to second male gamete. It is used by developing embryo

From given below in which seed endosperm may persist in the mature seed ?

Which one is an example of triploid tissue