Nomenclature Of Coordination Compounds

Both options are same. \underset{\text{Diamminesilver(I)}}{ {[Ag(NH_3)_2]^+}} \underset{\text{dicyanoargentate (I)}}{ {[Ag(CN)_2]^-}}

The IUPAC name for this coordination compound follows the naming convention where the ligand is named first, followed by the metal ion and its oxidation state. - The complex has five cyanide ( ) ligands and one nitrosyl ( ) ligand. The nitrosyl group is attached to the iron as and not as , and it is named as nitrosyl. - The oxidation state of iron in this complex is +3. Therefore, the IUPAC name is Potassium pentacyanonitro-N-ferrate (III). Thus, the correct answer is Option (B).