In the following question, four number pairs are given. In each pair the number on left side of (-) is related to the number of the right side of (-) with some Logic/Rule/Relation. Three pairs are similar on basis of same Logic/Rule/relation. Select the odd one out from the given sentence alternatives. (NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 - Operations on 13 such as adding /subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then perfosming mathematical opeataions on 1 and 3 is  not allowed)

13 - 25

The logic followed here is :

(Ist number × 2) - 3 = second number

(17 × 2) - 3  = 31

(13 × 2) - 1  = 25 which is odd

(15 × 2) - 3  = 27

(9 × 2) - 3  = 15