its formation by fusion of secondary nucleus with several sperms
being a haploid tissue
The correct option is A
being a diploid tissue
Perisperm is layer of nutritive tissue in the seeds of certain flowering plants that is derived from the nucellus and surrounds the embryo before fertilisation. It is a residual persistent nucells that remains in some seeds. The central cell (diploid) of the embryo sac after fusion with the male gamete (haploid), in a process can triple fusion becomes the primary endosperm nucleus which is triploid and eventually develop into the endosperm. The endosperm is a nutritive tissue and provides nutrients to the growing embryo. Perisperm is diploid while endosperm is triploid.