state gov UP NHM Staff Nurse 2023 Mock Test Nursing Environmental Sanitation

घरों के कचरों में ...... होता है।

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अजैवनिम्नीकरण
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जैवनिम्नीकरणीय प्रदूषक
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हाइड्रोकार्बन्स
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उपरोक्त में से कोई नहीं
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