FeSO4.7H2O show isomorphism with

In crystallography crystals are described as isomorphous if they are closely similar in shape. In order to form isomorphous crystals two substances must have the same chemical formulation, they must contain atoms which have corresponding chemical properties and the sizes of corresponding atoms should be similar. Hence, the complex 4 2 FeSO .7H O shows isomorphism with 4 2 ZnSO .7H O .Therefore, the correct option is (a).