Task: Question Answering
Input (English): Question: A and B invests Rs.3500 and Rs.4000 respectively in a business. If A doubles his capital after 6 months. In what ratio should A and B divide that year's profit?

 Option A: 21:5

 Option B: 21:16

 Option C: 21:2

 Option D: 9:9

 Option E: 21:11
Output (English): Option B