engineering recuitment BPSC Assistant Sanitary & Waste Management Officer Mock Test 2022 General Science Chemistry Hydrocarbons

निम्नलिखित में से कौन-सा स्वच्छ ईंधन का एक उदाहरण है?

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कोक
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प्रोपेन
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पेट्रोल
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मोम
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