The incubation period of $Plasmodium$ $vivax$ is ........

In which form does $Plasmodium$ enter the human body?

Mark the incorrect statement w.r.t. infection of $Entamoeba \ histolytica$.

The chill and fever recurring after $48$ hours in benign tertian malaria is due to

Identify the correct statements from the following:
$(i)$ The cryptozoite ingests food and becomes spherical.
$(ii)$ Sporozoites enter the human blood.
$(iii)$ Two stages of the life cycle are observed in Plasmodium.
$(iv)$ The cryptozoite transforms into cryptomerozoites.

Which of the following diseases is caused by a protozoan?