The treatment of snake bite by antivenom is an example of
Artificially acquired passive immunity
Artificially acquired active immunity
Naturally acquired active immunity
Naturally acquired passive immunity
Who discovered malarial parasite
Antibodies are produce by............
The cells which suppress the entire immune system from its attack in the same body are known as
AIDS related complex $(ARC)$ is a disease which leads to fever, swollen lymph nodes, night sweats, loss in weight etc. represents