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': 'The temporary feeling of dry mouth after tooth brushing with tooth paste is due to the presence of: \nSelect and explain. \nA. Sodium lauryl sulfate, B. Glycol, C. Sweetener, D. Friction due to brushing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]