Task: Question Answering
Input (English): Problem: simple interest on a certain sum at a certain annual rate of interest is 1 / 25 of the sum . if the numbers representing rate percent and time in years be equal , then the rate of interest is : 
Options: a ) 5 % , b ) 2 % , c ) 6 % , d ) 8 % , e ) 3 %
Output (English): b