Task: Question Answering
Input (English): Problem: a small table has a length of 12 inches and a breadth of b inches . cubes are placed on the surface of the table so as to cover the entire surface . the maximum side of such cubes is found to be 4 inches . also , a few such tables are arranged to form a square . the minimum length of side possible for such a square is 20 inches . find b . 
Options: a ) 8 , b ) 16 , c ) 4 , d ) 32 , e ) 48
Output (English): c