The IUPAC name of K[Ag(CN)2] is

In the given compound, the ligand in CN- with Ag as the central metal atom having the oxidation number of 1 and K being the counter ion. Since, the complex is an anion, "ate" will be added after the name of the central metal atom. And hence, the IUPAC name of the given coordination compound is potassium- dicyanoargentate (I). Therefore, the correct option is (c). COORDINATION COMPOUNDS 6