Task: Question Answering
Input (English): Problem: the average age of father and his two sons is 24 years. 5 years ago, the average age of the two sons was 15 years. if the difference between the ages of the two sons is 4 years, what is the present age of the father ?
Options: a. 45, b. 32, c. 47, d. 48, e. 49
Output (English): b