The correct IUPAC name of A) Triammine trinitrito – N cobalt (III) B) Triammine trinitrito cobalt (II) C) Triammine cobalt (III) nitrite D) Triammine trinitrito – N cobaltate (III)

Correct option is A) Triammine trinitrito – N cobalt

Triammine trinitro-N-cobalt is the correct IUPAC name (III). In this scenario, the groups are ordered alphabetically, with the ammine group coming first, followed by the nitro- group. The oxidation state of Co is +3.