In the primary attack of Plasmodium,the infective stage is:

For further development, the sporozoite must enter into the:

Plasmodium is inoculated in humans by

The active form of $Entamoeba \ histolytica$ feeds upon

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 $R$?

$A$ person suffering from a disease caused by $Plasmodium$ experiences recurring chill and fever at the time when: