For the complex [Ni(RNH2)6]2+ (R = alkyl), Δ0 is 12,600 cm-1. The spin-orbit coupling constant (λ) for the Ni2+ ion is -315 cm-1. The effective magnetic moment (μeff in BM) for the complex is closest to:

Match List I with List II: List I (Complex): A. [Pt(NH3)2Cl2] B. [Co(en)3]3+ C. [Co(NH3)5NO2]Cl2 D. [Cr(H2O)6]Cl3 List II (Type of isomerism): I. Optical II. Solvate III. Geometrical IV. Linkage Choose the correct answer from the options given below:

Which one of the following is an ambidentate ligand?