Which of the following basic nutrients does not contain any calories?
a. protein
b. carbohydrates
c. water
d. fat

The correct answer is c. water

Explanation:

The basic macromolecules that provide calories to the body are proteins, carbohydrates, and fats. Fats contain approximate 9 calories per gram, while proteins and carbohydrates contain 4 calories per gram. So fats contain more calories than others.

Water is the nutrient that does not contain any calories because it does not have any macromolecule like protein, carbohydrate, and fats in it. It contains only minerals that are required by the body to stay healthy.  

Water is the main constituent of blood and helps in the transport of nutrients to the cells of the body and removal of waste products from cells and body. So the right answer is c.  

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