$Entamoeba histolytica$ infection occurs through

Fertilization and development of Plasmodium occurs in

Assertion $A$: In the human body,$Plasmodium$ exhibits sexual reproduction.
Reason $R$: Sporozoites enter the salivary glands of the female $Anopheles$ mosquito.

'Amoebiasis' (Amoebic dysentery) is caused by

Which of the following stages is part of the exo-erythrocytic cycle of $Plasmodium$ in $Anopheles$?

Amoebiasis can be prevented by .............