Task: Question Answering
Input (English): Problem: a candidate who gets 20 % of the marks fails by 40 marks . but another candidate who gets 30 % marks gets 20 marks more than necessary for passing . find the number of marks for passing ? 
Options: a ) 100 marks , b ) 200 marks , c ) 280 marks , d ) 160 marks , e ) 827 marks
Output (English): d