In the following question, select the odd number pair from the given alternatives.
49 - 64
576 - 729
441 - 484
100 - 121
B.
As 49 - 64 = (7)2 - (8)2576 - 729= (24)2 - (27)2441 - 484 = (21)2 - (22)2100 - 121 = (10)2 - (11)2