A) Animal dung cakes have higher calorific value than biogas
B) Biogas has a lower calorific value.
C) Biogas is a smokeless fuel and it does not leave any residue
D) Biogas is easily accessible than animal dung
Correct Answer: C
Solution :
Biogas burns completely without giving smoke and any residue. So, it is a better fuel than animal dung cakes.
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