The correct option is B 12
Number of steps in first stair = 24
Factors of 24: 1, 2, 3, 4, 6, 8, 12 and 24
Number of steps of in second stair = 12
Factors of 1: 1, 2, 3, 4, 6 and 12
The maximum number of steps one should skip in order to reach the top in equal number of hops on both the stairs is 12.