Task: Question Answering
Input (English): Question: If the average marks of three batches of 70, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is

 Option A: 53.33

 Option B: 54.28

 Option C: 55

 Option D: 57

 Option E: None
Output (English): Option B