Food contains a number of basic elements such as carbohydrates, proteins, fats and alcohol. These elements all produce different quantities of energy when burnt. The amount of energy produced when one gram of any of these elements is burned is known as its calorific value.
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Which of the following have maximum calorific value?
A. Carbohydrates (your answer)
Fats produce energy 37 kJ/g
Proteins and most carbohydrates have 17 kJ/g
which makes FATS a correct option in my opinion.
Thanks Haris Khan for correction. Answer updated with details.