W hich of the f ollowing complex ions is not diamagnetic ?

A

$$[Sc(H_2O)_3 (NH_3)_3]^{3+}$$

B

$$[Ti(en)_2(NH_3)_2]^{4+}$$

C

$$[Cr (NH_3)_6]^{3+}$$

D

$$[Zn (NH_3)_6]^{2+}$$