(a) rete testis
(c) vas deferens
(d) female reproductive tract
Correct Option (d)
Reason : Capacitation is a process, where the spermatozoa acquire the capacity to fertilise the eggs. It occurs in female reproductive tract.
Capacitation involves following changes
(i) Dilution of inhibitory factors of semen.
(ii) Removal of cholesterol vesicles covering sperm head and acrosome.
(iii) Increase in the permeability of acrosome.