The IUPAC name of ${\text{K}}_3\left[\mathrm{Ir}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$ is

• A

  potassium trioxalato iridium (III)

• B

  potassium trioxalato iridate (III) 

• C

  potassium tris (oxalato) iridium (III)

• D

  potassium tris (oxalato) iridate (III)