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': 'A pulp polyp may arise in connection with: \nSelect and explain. \nA. Chronic open pulpitis, B. Pulp necrosis, C. Acute pulpitis, D. Chronic Periapical lesion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]