How spraying oil on stagnant water controls the mosquito population?

Mosquito larvae in the water will not be able to breathe.

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Water becomes impure for mosquitoes.

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Oil kills malarial parasites in mosquitoes.

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Larvae can not metamorphose into pupae in the presence of oil.

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Solution

The correct option is B Mosquito larvae in the water will not be able to breathe.
Stagnant water is the breeding ground for mosquitoes. If oil is sprayed on stagnant water, it will form a thin layer of oil on the surface. The mosquito larvae in the water will not be able to breathe and they will die.
So, the correct answer is option A.

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