Coordination compound have great importance in biological systems. In this context which of the following…

Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?
  1. Chlorophylls are green pigments in plants and contains calcium
  2. Carboxypeptidase $-\mathrm{A}$ is an enzyme and contains zinc
  3. Cyanocobalamin is $\mathrm{B}_{12}$ and contains cobalt
  4. Haemoglobin is the red pigment of blood and contains iron

Solution

Chlorophyll contains magnesium instead of calcium

Asked in: JEE Main 2004

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