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

Example Input: Problem: in a ratio which is equal to 4 : 6 , if the antecedent is 20 , then the consequent is ? 
Options: a ) 72 , b ) 85 , c ) 30 , d ) 51 , e ) 45
Example Output: c

Example Input: Problem: the compound ratio of 1 : 2 , 3 : 2 and 4 : 5 ? 
Options: a ) 1 : 9 , b ) 1 : 7 , c ) 1 : 2 , d ) 3 : 5 , e ) 1 : 4
Example Output: d

Example Input: Problem: one year ago , the ratio of roonie ’ s and ronaldo ’ s age was 6 : 7 respectively . 4 years hence , this ratio would become 7 : 8 . how old is ronaldo ? 
Options: a ) 32 , b ) 33 , c ) 34 , d ) 35 , e ) 36
Example Output:
e