Four pairs of numbers have been given, out of which three are alike in some manner, while one is different. Choose out the odd one.

236 : 325 : 263

761 : 617 : 176

In this 7,6, 1 are three  numbers use to form different combinations of given number

416 : 641 : 461

In this 4, 6, 1  are three numbers use to form different combinations of given numbers 

236 : 325 : 263

In this 2,3,5, 6 are four numbers use to form different combinations of given number.(odd)

189 : 198 : 819

In this 1,8, 9 are three  numbers use to form different combinations of given number

option 3 is odd because 4 numbers are used in it , in others 3 numbers are used