Definition: In this task, you need to provide the correct option for a given problem on probability from the provided options.
Input: Problem: if 4 consecutive letters are selected at random from the english alphabet , then the probability that one of the letters is a vowel is ?
Options: a ) 13 / 23 , b ) 16 / 23 , c ) 11 / 23 , d ) 17 / 23 , e ) 18 / 23
Output:
d