Boys have broader shoulders and wider chests compared to girls. This is because -

broad shoulders increase oxygen supply to the muscles

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muscles grow more prominently in boys

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both A and B are correct

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none of the above is correct

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Solution

The correct option is C
both A and B are correct

In boys, the muscles of the body grow more prominently than in the girls. Thus, having broader shoulders and wider chests, increase the oxygen supply to these muscles.

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