Which of the following statements is incorrect?

  • A
    The water molecule is non-polar.
  • B
    Phosphorus and potassium are macronutrients.
  • C
    $Mn^{+2}$ and $Zn^{+2}$ are micronutrients.
  • D
    $Na^+$ and $K^+$ maintain the osmotic pressure of intracellular fluid.

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