Among the following complexes (K-P)
K3[Fe(CN)6] (K), [Co(NH3)6]Cl3 (L), Na3[Co(oxalate)3] (M), [Ni(H2O)6]Cl2 (N), K2[Pt(CN)4] (O) and
[Zn(H2O)6](NO3)2 (P)
(A) K, L, M, N (B) K, M, O, P
(C) L, M, O, P (D) L, M, N, O