Question : The most abundant element by number in the living system is:
Option 1: Nitrogen
Option 2: Hydrogen
Option 3: oxygen
Option 4: carbon
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Correct Answer: Hydrogen
Solution : The correct option is Hydrogen.
The most abundant element by number in living systems is hydrogen. It's a fundamental component of many biological molecules, including water and organic compounds such as carbohydrates, proteins, lipids, and nucleic acids.
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