Task: Question Answering
Input (English): Question: A sum of Rs.4300 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.

 Option A: Rs.2520

 Option B: Rs.3120

 Option C: Rs.3320

 Option D: Rs.2795

 Option E: None of these
Output (English): Option D