engineering recuitment BPSC Assistant Sanitary & Waste Management Officer Mock Test 2022 General Science Biology Biology in Everyday life

कचरे के निपटान की उत्तम विधि क्या है?

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जलाना
2
जल प्रवाह में बहाना
3
खाद बनाना
4
भराव क्षेत्र बनाना
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