This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Chemical plaque control 
Select and explain. 
A. is an effective replacement for mechanical plaque control, B. is especially recommended after periodontal surgery, C. is best achieved using cetylpyridium chloride mouth washes, D. is of no use
B: is especially recommended after periodontal surgery
Answer: B: is especially recommended after periodontal surgery 
Explanation: None