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.

12 : 156  18 : 342  17 : 307  14 : 210

17 : 307

The logic followed here is: 12 : 156  → 122 + 12 =156 18 : 342  → 182 + 12 = 342 17 : 307  → 172 + 17 = 306 ≠ 307(odd) 14 : 210  → 122 + 12  = 210