Which of the following diseases is caused by a protozoan?

How many stages of the life cycle of $Anopheles$ are observed in humans?

What is the shape of a sporozoite?

Which form of $Plasmodium$ enters the human body?

In which stage of the life cycle of $Anopheles$ does the $metacryptomerozoite$ enter the red blood cell and become spherical?

In the life cycle of $Plasmodium \ vivax$,if $a$ (Trophozoite),$b$ (gametocyte),$c$ (oocyst),$d$ (zygote),$e$ (sporozoite) are different stages. Select the correct sequence starting from the stage it enters the human body.