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 most successful treatment for a vital primary second\nmolar with a large carious and pulpal exposure is \nSelect and explain. \nA. Indirect pulp treatment, B. Pulpotomy with formocresol, C. Pulpotomy with calcium hydroxide, D. Pulp capping with calcium hydroxide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]