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In over 40% of angiosperms, pollen grain...

In over 40% of angiosperms, pollen grains are shed at 3 celled stage, these 3 cells are :

A

Vegetative cell, Tube cell and Generative cell

B

One generative cell and two tube cells

C

One vegetative cell and two gametes

D

One generative cell and two gametes

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