A reaction fo granules content which harden the zona pellucida and ensures sure block to polyspermy is

Options

A. acrosomal reaction
B. cortical reaction
C. acrosin reaction
D. binding reaction

Answer

B

Explanation

Immediately after the fusion of sperm and egg plasma membranes, the egg shows a cortical reaction. In this reaction . In this reaction, the cortical granules present beneath the egg's plama membrane fuse with the plama membrane and release enzymes between it and zona pellucida. These enzymes harden the zona pellucida, which now functions to block polyspermy.