Task: Question Answering
Input (English): Problem: the percentage profit earned by selling an article for rs . 1920 is equal to the percentage loss incurred by selling the same article for rs . 1280 . at what price should the article be sold to make 15 % profit ? 
Options: a ) 2000 , b ) 2778 , c ) 1840 , d ) 2778 , e ) 2771
Output (English): c