CTET Class I to V 29 Dec 2021 Paper

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Question : 74 of 150

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In order to prevent mosquito proliferation, many methods are suggested. Find out a method which does not check the breeding of mosquitoes among the following:

Keep changing the water from the cooler at least twice in a week
Put fish in the ponds and water logging areas, so they eat the mosquitoes larvae
Use of mosquito nets
Spray oil if water has collected at any place

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