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The most abundant elements by mass in th...

The most abundant elements by mass in the body of a healthy human adult are Oxygen `(61.4%)`, Carbon `(22.9%)`. Hydrogen `(10.0)%)`, and Nitrogen `(2.6%)`. The weight which a `75 kg` person would gain if all `.^(1)H` atoms are replaced by `.^(2)H` atoms is

A

7.5kg

B

10kg

C

15kg

D

37.5kg

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The correct Answer is:
A
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