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प्रश्न
Open drain system is a breeding place for which of the following?
विकल्प
Flies
Mosquitoes
Organisms which cause diseases
All of these
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उत्तर
All of these
Explanation:
In some places, there are open drains to dispose off the sewage. These drains can easily get blocked by plastic bags and can overflow. Therefore, the problems of smell, breeding of mosquitoes, flies and germs are encountered in open drains.
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