Coordination compound have great importance in biological system .In this content which of the following statement is incorrect

Question

$\begin{array}{1 1}(a)\;\text{Chlorophyll are green pigments in plants and contains calcium}\\(b)\;\text{Carboxypeptidense-A is an enzyme and contains zinc}\\(c)\;\text{Cyanocobalamin is }B_{12}\;\text{and contains cobalt}\\(d)\;\text{Haemoglobin is the red pigment of blood and contains ion}\end{array}$