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 from the rest.

954 : 549 198 : 981 132 : 321 246 : 426

246 : 426

The logic followed here is : The place of ist digit become 3rd,  the place of second digit become 1st and the place of Third digit become 2nd. 954 : 549 198 : 981 132 : 321 246 : 426 it will 462 thats why it is odd