In this task, you need to provide the correct option for a given problem from the provided options.

Example Input: Problem: in a college the ratio of the numbers of boys to the girls is 8 : 5 . if there are 135 girls , the total number of students in the college is ? 
Options: a ) 562 , b ) 351 , c ) 452 , d ) 416 , e ) 512
Example Output: b

Example Input: Problem: of the 200 stamps in a collection , 90 are foreign and 60 are more than 10 years old . if 20 stamps are both foreign and more than 10 years old , how many stamps are neither foreign nor more than 10 years old ? 
Options: a ) 50 , b ) 70 , c ) 100 , d ) 130 , e ) 150
Example Output: b

Example Input: Problem: if log 1087.5 = 4.9421 , then the number of digits in ( 875 ) 10 is ? 
Options: a ) 60 , b ) 28 , c ) 27 , d ) 26 , e ) 25
Example Output:
a