Three complexes,
[CoCl(NH₃)₅] ²⁺(I),
[Co(NH₃)₅H₂O]³⁺ (II) and
[Co(NH₃)₆] ³⁺(III)
absorb light in the visible region. The correct order of the wavelength of light absorbed by them is :

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are :

The degenerate orbitals of [Cr(H₂O)₆]³⁺ are :

The one that will show optical activity is :
(en = ethane-1,2-diamine)