Which element shows the given characteristics?
$(i)$ It maintains an anion-cation balance in cells.
$(ii)$ It is also involved in protein synthesis.
$(iii)$ It is required for the opening and closing of stomata.
$(iv)$ It is required for the maintenance of the turgidity of cells.

  • A
    Nitrogen
  • B
    Phosphorus
  • C
    Potassium
  • D
    Calcium

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