Select the option in which the two numbers are related in the same way as are the two numbers of the following number-pair. 24 : 648

25 : 652 22 : 550 20 : 421 26 : 654

22 : 550

24 : 648 The logic followed here is Square of next number of ist number + Ist number - 1 =  IInd number as 252 + 24 - 1 = 625  + 24 - 1 = 649 -  1 = 648 Similarly 22 : 550 232 + 22 - 1 = 529 + 22 - 1 = 551 -  1 = 550