Among the following, the complex ion or ions that will have a magnetic moment of 2.82 B.M. is or are I. $$[\text{Ni(CO)}_4]$$. II. $$[\text{NiCl}_4]^{2-}$$. III. $$[\text{Ni(H}_2\text{O})_6]^{2+}$$. IV. $$[\text{Ni(CN)}_4]^{2-}$$.

A

I and IV

B

II only

C

II and III

D

II, III and IV