The IUPAC name of compound ${\mathrm{Na}}_3\left[\mathrm{Co}{\left(\mathrm{ONO}\right)}_6\right]$ will be

• A

  hexanitritocobalt (III) sodium

• B

  sodium cobalt nitrite

• C

  sodium hexanitrocobaltate (III)

• D

  sodium hexanitrito-o-cobaltate (III)