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
Which of the following is an advisable chemical plaque controlling agent? 
Select and explain. 
A. Disclosing agent, B. Antibiotics, C. Enzymes, D. Antiseptic mouth wash, e.g. chlorhexidine
D: Antiseptic mouth wash, e.g. chlorhexidine
Answer: D: Antiseptic mouth wash, e.g. chlorhexidine 
Explanation: None