Among the fuels [[1]] has the highest calorific value.

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answer is HYDROGEN.

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Detailed Solution

Among the fuels, hydrogen has the highest calorific value.

The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value. The calorific value of a fuel is expressed in a unit called kilojoule per kg. The calorific value of hydrogen is 150000 kilojoule per kg, the highest among the fuels.

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