Task: Question Answering
Input (English): Problem: the cash difference between the selling prices of an book at a profit of 2 % and 4 % is $ 3 . the ratio of the two selling prices is : 
Options: a ) 55 : 23 , b ) 52 : 33 , c ) 51 : 52 , d ) 45 : 53 , e ) 51 : 34
Output (English): c