Task: Question Answering
Input (English): Question: Seven years back, a father was 48 years older than his son. At present the father is 4 times as old as the son. How old will the son be three years from now?

 Option A: 16 years

 Option B: 17 years

 Option C: 18 years

 Option D: 19 years

 Option E: 20 years
Output (English): Option D