The sporozoites that cause infection, when a female Anopheles mosquito bites a person, are formed in

Options

A. liver of human
B. RBCs of mosquito
C. salivary glands of mosquito
D. intestine of human

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism and Disease**: The question refers to sporozoites, which are associated with malaria. The causative agent of malaria is the Plasmodium species, particularly Plasmodium vivax.

2. **Understand the Life Cycle of Plasmodium**: The life cycle of Plasmodium involves two hosts: humans and female Anopheles mosquitoes. In humans, the asexual reproduction occurs, while the sexual reproduction takes place in the mosquito.

3. **Sporozoite Formation**: In the female Anopheles mosquito, after the fertilization of gametes, a zygote is formed. This zygote develops into an oocyst.

4. **Location of Sporozoite Production**: The oocyst eventually ruptures, releasing sporozoites. These sporozoites are produced in the gut (or intestine) of the female Anopheles mosquito.

5. **Storage of Sporozoites**: After their formation in the intestine, the sporozoites migrate to and are stored in the salivary glands of the mosquito.

6. **Infection Process**: When the female Anopheles mosquito bites a human, the sporozoites are injected into the bloodstream, initiating the infection.

**Final Answer**: The sporozoites that cause infection when a female Anopheles mosquito bites a person are formed in the intestine of the mosquito.

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