Question

7. 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 whereas dung cake can be used for cooking,
illuminant the lanterns.​

Answer 1

Answer:

all the above given options ar right