Which of the following is true about energy contents?

Which of the following is true about energy contents? 



A. fat = 9 kcal/gram, carbohydrate = 7 kcal/gram, water = 0 kcal/gram
B. carbohydrate = 7 kcal/gram, protein = 4 kcal/gram, alcohol = 7 kcal/gram
C. water = 0 kcal/gram, protein = 4 kcal/gram, alcohol = 7 kcal/gram
D. protein = 9 kcal/gram, fat = 4 kcal/gram, carbohydrate = 4 kcal/gram


Answer: C


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