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 NOT associated with long-term use of Chlorhexidine? 
Select and explain. 
A. Brownish discolouration of teeth, B. Oral mucosal erosion, C. Sweet taste perception affected, D. Occasional bilateral parotid swelling
D: Occasional bilateral parotid swelling
Answer: D: Occasional bilateral parotid swelling 
Explanation: None