Question

Which one of the following fuels is cheapest?
a)Natural gas
b)Petrol
c)Biogas
d)All of these​

Answer 1

Answer:

Biogas is the cheapest as it is a renewable source of energy.Rest others are non-renewable source of energy (Natural gas and petrol)

So answer is Biogas

Answer 2

Answer:

option A ho ga lag ta hai