Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
(a) Chlorophylls are green pigments in plants and contain calcium.
(b) Haemoglobin is the red pigment of blood and contains iron.
(c) Cyanocobalamine is B 12 and contains cobalt.
(d) CarboxypeptidaseA is an enzyme and contains zinc.
