Task: Question Answering
Input (English): Problem: if an article is sold at 12 % profit instead of 16 % profit , then the profit would be rs . 105 less . what is the cost price ? 
Options: a ) rs . 3000 , b ) rs . 4000 , c ) rs . 3500 , d ) rs . 4500 , e ) rs . 6000
Output (English): b