Analogy - Verbal and Reasoning

Directions to SolveIn each of the following questions find out the alternative which will replace the question mark.
Q1:

61 : 121 :: ? : 337

A 211

B 222

C 220

D 240

ANS:A - 211

Explanation: As, 61 = (4)3 - 3     121 = (5)3 - 4 and 337 = (7)3 - 6 Therefore, ? = (6)3 - 5 = 211