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 one of the following conditions does not require any treatment unless it becomes symptomatic? \nSelect and explain. \nA. Subacute pulpitis, B. Chronic pulpitis, C. Pulp fibrosis, D. Apical cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]