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

Question

( A ) $[Co(H_2O)_6 ]^{3+}, [Co(NH_3)_6]^{3+}, [Co (en)_3]^{3+}$
( B ) $[Co(NH_3)_6]^{3+}, [Co (en)_3]^{3+}, [Co(H_2O)_6 ]^{3+}$
( C ) $ [Co(H_2O)_6 ]^{3+}, [Co (en)_3]^{3+}, [Co(NH_3)_6]^{3+}$
( D ) $[Co(en)_3]^{3+}, [Co(NH_3)_6]^{3+}, [Co (H_2O)_6]^{3+}$