Correct increasing order for the wavelengths of absorption in the visible region for the complexes of ${\text{Co}}^{3+}$ is:

1. A
   $[\text{Co}(en{)}_3{]}^{3+},[\text{Co}({\text{NH}}_3{)}_6{]}^{3+},[\text{Co}({\text{H}}_2\text{O}{)}_6{]}^{3+}$
2. B
   $[\text{Co}({\text{H}}_2\text{O}{)}_6{]}^{3+},[\text{Co}(en{)}_3{]}^{3+},[\text{Co}({\text{NH}}_3{)}_6{]}^{3+}$
3. C
   $[\text{Co}({\text{H}}_2\text{O}{)}_6{]}^{3+},[\text{Co}({\text{NH}}_3{)}_6{]}^{3+},[\text{Co}(en{)}_3{]}^{3+}$
4. D
   $[\text{Co}({\text{NH}}_3{)}_6{]}^{3+},[\text{Co}(en{)}_3{]}^{3+},[\text{Co}({\text{H}}_2\text{O}{)}_6{]}^{3+}$