The endosperm of Brassicais

Coconut water from a 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

Morphologically the white fluffy edible mass in maize is

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