Task: Question Answering
Input (English): Question: A sum is invested at compounded interest payable annually. The interest in the first two successive years was Rs. 400 and Rs. 420. The sum is

 Option A: Rs. 8000

 Option B: Rs. 8200

 Option C: Rs.7500

 Option D: Rs. 8500

 Option E: Rs. 9000
Output (English): Option A