Task: Question Answering
Input (English): Problem: a man whose bowling average is 12.4 , takes 4 wickets for 26 runs and there by decreases his average by 0.4 . the number of wickets taken by him before his last match is ? 
Options: a ) 53 , b ) 54 , c ) 55 , d ) 56 , e ) 57
Output (English): c