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 the most difficult pulpal or periapical pathosis to diagnose \nSelect and explain. \nA. Necrotic pulp, B. Chronic Pulpitis, C. Internal resorption, D. Acute alveolar abscess', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]