In the human body,$Plasmodium$ is . . . . . . .

Assertion $A$: $Plasmodium$ is a microscopic protozoan.
Reason $R$: Humans and female $Anopheles$ mosquitoes are the hosts of $Plasmodium$.
Which option is correct for Assertion $A$ and Reason $R$?

Tse-tse fly is a vector for sleeping sickness which transmits the infective stage of which of the following parasite?

Which of the following stages is part of the life cycle of $Anopheles$?

Chloroquine is used for the treatment of

Fertilization and development of Plasmodium occurs in