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 best filling material in deciduous teeth for RCT: \nSelect and explain. \nA. Gutta-percha, B. Calcium hydroxide, C. Zinc Oxide Eugenol, D. Amalgam', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]