Question:medium
Which is a non-deliberate measure for control of mosquitoes?
Which is a non-deliberate measure for control of mosquitoes?
Show Hint
Which one fights mosquitoes only as a side effect, not on purpose?
Updated On: Jun 24, 2026
- Use of alkalinity-causing soaps
- Efforts by the community to prevent development of an environment suitable for mosquitoes
- Use of larvicides
- Use of bed nets against mosquitoes
Show Solution
The Correct Option is B
Solution and Explanation
The question asks which control method works against mosquitoes without being aimed directly at them, that is, a non-deliberate or incidental measure.
Anything labelled deliberate is a targeted antivector action. Adding alkalinity-causing soap to water is a planned chemical modification of breeding sites, so it is deliberate. Larvicides are purpose-made chemicals dropped into water specifically to destroy larvae, again deliberate. Sleeping under a bed net is a planned personal barrier to keep biting mosquitoes away, so it too is deliberate.
By contrast, when a community keeps its surroundings clean, drains stagnant water and improves sanitation for general hygiene, mosquito breeding falls as a side effect rather than as the primary goal. That makes it the non-deliberate measure.
Note that the printed answer key chose the alkalinity soap option, but that is a deliberate chemical step and is medically wrong; the correct choice is the community environmental effort.
\[\boxed{\text{Efforts by the community to prevent a mosquito-suitable environment}}\]
Anything labelled deliberate is a targeted antivector action. Adding alkalinity-causing soap to water is a planned chemical modification of breeding sites, so it is deliberate. Larvicides are purpose-made chemicals dropped into water specifically to destroy larvae, again deliberate. Sleeping under a bed net is a planned personal barrier to keep biting mosquitoes away, so it too is deliberate.
By contrast, when a community keeps its surroundings clean, drains stagnant water and improves sanitation for general hygiene, mosquito breeding falls as a side effect rather than as the primary goal. That makes it the non-deliberate measure.
Note that the printed answer key chose the alkalinity soap option, but that is a deliberate chemical step and is medically wrong; the correct choice is the community environmental effort.
\[\boxed{\text{Efforts by the community to prevent a mosquito-suitable environment}}\]
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