Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

17 : 204 9 : 99 7 : 84 11 : 132

9 : 99

The logic followed here is : 17 : 204 = 17 × 12 = 204 9 : 99 = 9 × 12 = 108 ≠ 99 (odd) 7 : 84 = 7 × 12 = 84 11 : 132 = 11 × 12 = 132