During copulation, semen is released by the penis into the vagina. The motile sperms swim rapidly, fuse with ovum in the ampullary region, resulting in fertilisation. Haploid nucleus of sperm fuses with that of ovum to form diploid zygote.
In female genital tract, sperms are made capable of fertilising the egg. This phenomenon of sperm activation is called

Options

A. amphimixis
B. cortical reaction
C. capacitation
D. acrosomal reaction

Answer

C