The sporozoites that cause infection when a female Anopheles mosquito bites a human being are formed in:
The correct option is
salivary glands of the mosquito
Sporozoites enter the female Anopheles mosquito when they bite an infected person where this sporozoite fertilizes and multiply in the stomach wall of the female Anopheles and is stored in the salivary gland of the mosquito till it is again transferred to the human body by a mosquito bite.
After entering the human body the sporozoites reach the liver cells, where they multiply. This is followed by their attack on red blood cells resulting in their rupture. The ruptured RBCs release a toxin called hemozoin, which is responsible for high recurring fever, chills, and shivering.