In the given question, find the odd pair of number from the given alternative.

7 - 296

13³ – 13²          11³ – 11²               9³ – 9²                   7³ – 7²

2197 – 169  ,     1331 – 121  ,         729 – 81               343 – 49

=  2028              =  1210                 =  648                 =  294

So, correct answer is option (D).