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 method of treating internal resorption: \nSelect and explain. \nA. Extirpation of pulp and calcium hydroxide dressing, B. b)\tExtirpation of pulp and formocresol dressing, C. c)\tPulpotomy, D. Pulp capping', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]