The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair.
Explanation:
The logic is n : n2 - 2n
53 : 532 - 106 = 2703
24 : 242 - 48 = 528
68 : 682 - 136 = 4488
Hence, option (a).