Select the option that is related to the third number in the same way as the second number is related to the first number. 325 : 18 :: 226 : ?

14 17 15 16

15

Pattern followed is : 325 : 18 182 + 1 = 324 + 1 = 325 Similarly , 226 : ? x2 + 1 = 226 x2 = 225 x = 15 15 , is correct answer .