$Mg$ and $Fe$ are required by plants for the:

  • A
    Energy transfer concerned with photosynthesis
  • B
    Synthesis of chlorophyll pigments in leaves
  • C
    Mechanism of stomatal opening and closing
  • D
    Translocation of carbohydrates from the leaf to the stem

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$A$: Phosphorus is essential in the structure of $ATP$.
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