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

1. (III) > (I) > (II)
2. (III) > (II) > (I)
3. (I) > (II) > (III)
4. (II) > (I) > (III)

Correct answer: (I) > (II) > (III)

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