Select the option in which the numbers are related in the same way as are the numbers in the given set.

(7, 15, 31)

(3, 7, 15)

(7, 15, 31)

The Logic followed here is :

(Ist number × 2) + 1 =IInd number and (IInd number × 2) + 1 = IIIrd number

AS

(7 × 2) + 1 =15 and (15 × 2) + 1 = 21

Similarly (3, 7, 15)

(3 × 2) + 1 = 7 and (7 × 2) + 1 = 15