The correct option is C LPG
Amount of heat enrgy produced on complete combustion of 1kg of a fuel is called its calrific value. The calorific value of a fuel is expressed in a unit called kilojoule per kg kJ/kg
The calorific value of petrol, kerosene,and biogas is below 50000kJ/kg but the calorific value of LPG is approximately 55000 kJ/kg