Which one of the following is categorised as a parasite in true sense

Options

A. The cuckoo (Koel) lays its egg in crow's nest
B. The female Anopheles bites and sucks blood from humans
C. Human foetus developing inside the uterus draws nourishment from the mother
D. Head louse living on the human scalp as well as lying eggs on human hair

Answer

D

Explanation

Head louse living on the human scalp as well as laying eggs on human hair is a parasite in true sense. Female mosquito is not considered as a parasite, through it needs human blood for reproduction Koel that lays in crow's human nest is just a brood parasite Through it needs human blood for reproduction Koel that lays in crow's nest is just a brood parasite