Task: Question Answering
Input (English): Problem: doughnuts , cookies and muffins in a pastry shop are in the ratio of 5 : 3 : 1 . if there are 50 doughnuts , the number of muffins in the shop is : . 
Options: a ) 25 , b ) 30 , c ) 10 , d ) 15 , e ) 20
Output (English): c