Select the option that is related to the third number in the same way as the second number is related to the first number. 28 :: 729 : 32 : ?

961 973 824 738

961

28 :: 729 : 32 : ? The logic followed here is (Ist number - 1)2 = IInd number AS 28 :: 729 (28 - 1)2 = 272 = 729 Similarly 32 : ? (32  - 1)2 = 312 = 961