Task: Question Answering
Input (English): Problem: george went to a fruit market with certain amount of money . with this money he can buy either 50 oranges or 40 mangoes . he retains 10 % of the money for taxi fare and buys 10 mangoes . how many oranges can he buy ? 
Options: a ) 25 , b ) 30 , c ) 20 , d ) 16 , e ) 12
Output (English): c