Carbon, hydrogen, nitrogen and oxygen along with two more elements constitutes the mass of living organisms. The other two elements are

Phosphorus and sulphur

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Phosphorus and calcium

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Phosphorus and chloride

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Sulphur and magnesium

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Solution

The correct option is D Phosphorus and calcium
About 98% of the mass of every living organism including bacterium (microbes) to the complex body of mammals is composed of just six elements. These are carbon (C), Hydrogen (H), Nitrogen (N), Oxygen (O), Phosphorus (P) and Calcium.
Thus, the correct answer is 'Phosphorus and calcium'.

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About 98 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen, calcium and

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