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The correct increasing order of stability of the complexes based on $\Delta_{0}$ value is :
(I) $\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}$
(II) $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{4-}$
(III) $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4}$
(IV) $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$

• A
  II $<$ III $<$ I $<$ IV
• B
  IV $<$ III $<$ II $<$ I
• ✓
  I $<$ II $<$ IV $<$ III
• D
  III $<$ II $<$ IV $<$ I