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': 'Cavity with normal depth is closest to pulp in \nSelect and explain. \nA. Class I Amalgams, B. Class II Amalgam, C. Class V Amalgam, D. Cast restortion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]