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

Example Input: Problem: if m = 3 ^ n , what is the greatest value of n for which m is a factor of 16 ! 
Options: a ) 8 , b ) 10 , c ) 6 , d ) 14 , e ) 16
Example Output: c

Example Input: Problem: an alloy is to contain steel and iron in the ratio 5 : 2 . the iron required to be melted with 35 kg of steel is ? 
Options: a ) 12 kg , b ) 14 kg , c ) 15 kg , d ) 20 kg , e ) 18 kg
Example Output: b

Example Input: Problem: there are 10 girls and 20 boys in a classroom . what is the ratio of girls to boys ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 5 , d ) 10 / 30 , e ) 2 / 5
Example Output:
a