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

Example Input: Problem: in a certain pet shop , the ratio of dogs to cats to bunnies in stock is 3 : 7 : 12 . if the shop carries 375 dogs and bunnies total in stock , how many dogs are there ? 
Options: a ) 42 , b ) 66 , c ) 75 , d ) 112 , e ) 154
Example Output: c

Example Input: Problem: in what ratio mental a at rs . 68 per kg be mixed with another metal at rs . 96 per kg so that cost of alloy ( mixture ) is rs . 82 per kg ? 
Options: a ) 5 : 8 , b ) 4 : 7 , c ) 3 : 7 , d ) 1 : 1 , e ) 9 : 8
Example Output: d

Example Input: Problem: ratio and proportion 215 : 474 : : 537 : ? 
Options: a ) 26 , b ) 27 , c ) 25 , d ) 22 , e ) 23
Example Output:
a