Task: Question Answering
Input (English): Problem: there are two concentric circles with radii 5 and 4 . if the radius of the outer circle is increased by 20 % and the radius of the inner circle decreased by 50 % , by what percent does the area between the circles increase ? 
Options: a ) 56 , b ) 156 , c ) 256 , d ) 356 , e ) 456
Output (English): c