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 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 performing mathematical operations on 1 and 3 is not allowed)

32859 - 98523

The logic followed  here is :

second number is reverse of digit of ist number

32859  ⇒ 95823 but  98523 is given thats why it is  odd

78434  ⇒ 43487 = 43487

58299  ⇒ 99285 = 99285

63942  ⇒ 24936 = 24936