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
Chlorhexidine mouth rinsing: 
Select and explain. 
A. Specifically inhibits gram-negative bacteria, B. Can inhibit subgingival plaque, C. May disturb taste sensation, D. Can only be obtained on prescription
C: May disturb taste sensation
Answer: C: May disturb taste sensation 
Explanation: None