A complex anion is formed by Osmium ( in some oxidation state ) with ligands ( in proper number so that coordination number of osmium becomes six ). Which of the following can be its correct IUPAC name ?
A. pentachloridonitridoosmium(VI)
B. pentachloridonitridoosmate(VI)
C. azidopentachloridoosmate(VI)
D. None of these