The IUPAC name of ${\mathrm{K}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$ is

• A

  potassium hexacyanidoferrate (II)

• B

  potassium ferrocyanide

• C

  tetrapotassium hexacyanidofenate (II)

• D

  tetrapotassium ferroushexacyanide (II)