The endosperm in angiosperms develops from

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(B) In angiosperms,the endosperm develops through the process of triple fusion,where one male gamete fuses with the secondary nucleus (or definitive n

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Secondary nucleus

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(B) In angiosperms,the endosperm develops through the process of triple fusion,where one male gamete fuses with the secondary nucleus (or definitive nucleus).The secondary nucleus is a diploid $(2n)$ structure formed by the fusion of two polar nuclei (one from the chalazal end and one from the micropylar end) before fertilization.Upon fusion with a haploid $(n)$ male gamete,it forms a primary endosperm nucleus $(PEN)$,which is triploid $(3n)$.Therefore,the endosperm develops from the secondary nucleus after fertilization.

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