Which of the following groups of macro-nutrients is a constituent of protein?

Which of the following groups of macro-nutrients is a constituent of protein?
  • A.
    nitrogen,phosphorus and sulphur
  • B.
    calcium,magnesium and potassium
  • C.
    magnesium,calcium and phosphorus
  • D.
    sulphur,magnesium and potassium
Correct Answer: Option A
Explanation
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