All the following complexes show decrease in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :
(I) Ni(CO)4, (II) K[AgF4], (III) Na2[Zn(CN)4], (IV) K2[PtCl4], (V) [RhCl(PPh3)3]
(A) II , III , V
(B) I , II , III
(C) I , III , IV
(D) none of these