Post Fertilisation Structures And Events

The endosperm of gymnospermsis haploid. It is a pre-fertilizationtissue that is equivalent to female gametophyte, therefore it is haploid in nature. However, in angiosperms, it is the post-fertilization tissue and is triploid in nature.

Therefore, the correct option is D) Haploid.

Perisperm differs from endosperm in Being a diploid tissue.

The endosperm is a tissue present inside the seeds of most angiosperms at the time of fertilization. It contains oils and protein and surrounds the embryo providing nutrition in the form of starch. These are typically triploid (3n) but can vary widely from diploid. Endosperm that is diploid, results from the fusion of a pollen nucleus with one, rather than two, maternal nuclei. They are both nutritive layers in a seed. Perisperm is a nutritive tissue of seed that develops from the nucellus and is deposited externally into the embryo sac. While the endosperm develops when the sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule). Perisperm occurs in the seeds of black pepper, coffee, castor, cardamom, and Nymphaea. 

Therefore, the correct answer is option D.