In $\mathrm{Fe}_{\mathrm{x}}\left[\mathrm{Fe}_{\mathrm{y}}(\mathrm{CN})_6\right]_3, \mathrm{x}$, y respectively, are

• A

  3,2
• Correct answer
  B

  4,1
• C

  2,3
• D

  1,4

Hence, the correct answer is option: 'B'.