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

Example Input: Problem: the ratio of spinsters to cats is 2 to 7 . if there are 55 more cats than spinsters , how many spinsters are there ?
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
Example Output: c

Example Input: Problem: the hcf of two numbers is 42 and the other two factors of their lcm are 10 and 20 . what is the largest number .
Options: a ) 462 , b ) 450 , c ) 840 , d ) 504 , e ) 555
Example Output: c

Example Input: Problem: in a group of people , if 30 people were made to stand in each column , 16 columns could be formed . if 40 people were made to stand in a column , how many columns could be formed ?
Options: a ) 12 , b ) 14 , c ) 16 , d ) 18 , e ) 20
Example Output:
a