Botany - Biomolecules Question with Solution | TestHub

The approximate contribution of various elements to the percentage weight of the human body is as follows:
Oxygen (O) $\approx 65.0\%$
Carbon (C) $\approx 18.5\%$
Hydrogen (H) $\approx 9.5\%$
Nitrogen (N) $\approx 3.3\%$

Arranging these elements in descending order of their percentage weight, we get:
Oxygen $>$ Carbon $>$ Hydrogen $>$ Nitrogen

This corresponds to the sequence (a), (b), (c), (d).

Answer: (a), (b), (c), (d)