Explanation by: Official MCQ Buddy

Chlorophyll is the green pigment in plants responsible for photosynthesis. At its core, chlorophyll molecules contain a magnesium (Mg) atom, which plays a crucial role in capturing light energy.

  • (A) K (Potassium) – Essential for plant growth but not a part of the chlorophyll molecule.
  • (C) Fe (Iron) – Important for chlorophyll synthesis but not present in the chlorophyll structure.
  • (D) Mn (Manganese) – Helps in photosynthesis but is not a part of chlorophyll.

Thus, Magnesium (Mg) is the correct answer.

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