Q. Biogas is a better fuel than animal dung cake because
  • (A) biogas has lower calorific value.
  • (B) animal dung cake has high calorific value
  • (C) biogas bums smoke and leaves no residue
  • (D) biogas is used as a fuel for cooking only wheareas dung cake can be used for cooking, illuminant the lanterns.
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✅ Correct Answer: (C) biogas bums smoke and leaves no residue

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Yatendra Sir
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