Task: Question Answering
Input (English): Problem: if the cost price of 18 articles is equal to the selling price of 16 articles, what is the percentage of profit or loss that the merchant makes ?
Options: a. 20 % loss, b. 12.5 % profit, c. 33.33 % loss, d. 30.33 % loss, e. none of these
Output (English): b