Which of the following is not correct?

  • A
    Chlorophyll is responsible for the synthesis of carbohydrates in plants
  • B
    The compound formed in the addition of oxygen to haemoglobin is called oxyhaemoglobin
  • C
    Acetyl salicylic acid is known as aspirin
  • D
    The metal ion present in vitamin $B_{12}$ is $Mg^{2+}$

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