What is the major substance constituting the human body?

Water

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Fats

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Proteins

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Carbohydrates

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Solution

The correct option is A Water
Up to 60% of the human adult body is water. The brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water. muscles and kidneys are 79%, and even the bones are watery 31%. So, the correct option is "A" (Water).

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