Which of the following represents the correct increasing order of calorific value of the given fuels?

Hydrogen < Cow dung cake < LPG < Biogas < Coal

Hydrogen < LPG < Biogas < Cow dung cake < coal

Cow dung cake < Biogas < LPG < Coal < Hydrogen

Which of the following represents the correct increasing order of calo

1.	Which of the following represents the correct increasing order of calorific value of the given fuels?
A.	Hydrogen < LPG < Biogas < Cow dung cake < coal
B.	Cow dung cake < Biogas < LPG < Coal < Hydrogen
C.	Vitamins
D.	Hydrogen < Cow dung cake < LPG < Biogas < Coal
Answer» D. Hydrogen < Cow dung cake < LPG < Biogas < Coal