Write the importance of $Zn^{2+}$ and $Cu^{2+}$ in plants.

  • A
    Activates enzymes like carboxylases and is involved in auxin synthesis.
  • B
    Essential for overall metabolism and redox reactions in photosynthesis.
  • C
    Both are required for chlorophyll synthesis and electron transport.
  • D
    Both are involved in nitrogen fixation and water splitting.

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