I think that Carbon is present in the form of either carbon dioxide, carbohydrates and hydro carbons, while hydrogen is present in the form of water, carbohydrates and hydrocarbons as well. May b, u r right, but what about my guess ?

Also plz consider the fact that water is the most constituent part of a living cell.

and sorry to mention carbohydrates seperately from hydrocarbs. They are a form of hydrocarbs

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