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
[{'content': 'Which of the following is NOT associated with long-term use of Chlorhexidine? \nSelect and explain. \nA. Brownish discolouration of teeth, B. Oral mucosal erosion, C. Sweet taste perception affected, D. Occasional bilateral parotid swelling', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]