Task: Question Answering
Input (English): Problem: kiran has 85 currency notes in all , some of which were of rs . 100 denomination and the remaining of rs . 50 denomination . the total amount of all these currency notes was rs . 5000 . how much amount did she have in the denomination of rs . 50 ? 
Options: a ) 1900 , b ) 3500 , c ) 4000 , d ) 4200 , e ) 4450
Output (English): b