Task: Question Answering
Input (English): Problem: the expression x # y denotes the product of the consecutive multiples of 3 between x and y , inclusive . what is the sum of the exponents in the prime factorization of 21 # 42 ? 
Options: a ) 23 , b ) 24 , c ) 25 , d ) 26 , e ) 27
Output (English): a