Task: Question Answering
Input (English): Problem: a bus starts from city x . the number of women in the bus is half of the number of men . in city y , 16 men leave the bus and 8 women enter . now , number of men and women is equal . in the beginning , how many passengers entered the bus ? 
Options: a ) 15 , b ) 30 , c ) 36 , d ) 72 , e ) 46
Output (English): d