Double fertilisation (or triple fusion) leading to initiation of endosperm in angiosperms, requires

Options

A. fusion of one polar nucleus and the second male gamete only
B. fusion of two polar nuclei and the second male gamete
C. fusion of four or more polar nuclei and the second male gamete only
D. all of the above kinds of fusion in different angiosperms

Answer

B

Explanation

In angiosperms the endosperm is a special tissue which is formed as a result of triple fusion. In triple fusion the second male gamete fuses with secondary nucleus (diploid nucleus formed by fusion of two polar nuclei) to form triploid primary endosperm nucleus.