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

Options

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

Answer

C

Explanation

A parasite in the true sense is an organism which obtains both food and space/ shelter form the host and does not benefit th host.