Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.

Complexes: $\begin{array}{cccc}\underset{\mathrm{A}}{{\left[{\mathrm{CoF}}_6\right]}^{3-}},& \underset{\mathrm{B}}{{\left[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}},& \underset{\mathrm{C}}{{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}}\text{ and }\underset{\mathrm{D}}{{\left[\mathrm{Co}(\mathrm{en}{)}_3\right]}^{3+}}& \end{array}$

Choose the correct option :

• A

  $\mathrm{B}<\mathrm{C}<\mathrm{D}<\mathrm{A}$
• Correct answer
  B

  $\mathrm{B}<\mathrm{A}<\mathrm{C}<\mathrm{D}$
• C

  $\mathrm{A}<\mathrm{B}<\mathrm{C}<\mathrm{D}$
• D

  $\mathrm{C}<\mathrm{D}<\mathrm{B}<\mathrm{A}$

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