Task: Question Answering
Input (English): Problem: find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1 : 2 ? 
Options: ['a ) 1 : 2', 'b ) 2 : 3', 'c ) 2 : 9', 'd ) 2 : 1', 'e ) 2 : 2']
Output (English): a