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

Example Input: Problem: how many even integers from 1 to 200 ( both inclusive ) have even number of factors ? 
Options: a ) 13 , b ) 14 , c ) 5 , d ) 6 , e ) 7
Example Output: e

Example Input: Problem: if there are 10 apples and 20 oranges , what is the ratio of apples to oranges ? 
Options: a ) 10 : 20 , b ) 2 : 4 , c ) 1 : 2 , d ) 4 : 8 , e ) it can not be determined from the information given
Example Output: c

Example Input: Problem: of the people who responded to a market survey , 60 preferred brand x and the rest preferred brand y . if the respondents indicated a preference for brand x over brand y by ratio of 3 to 1 , how many people responded to the survey ? 
Options: a ) 80 , b ) 150 , c ) 240 , d ) 360 , e ) 480
Example Output:
a