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': 'Most ideal post pulpectomy material is: \nSelect and explain. \nA. ZOE, B. Gutta-percha, C. Metapex, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Composition of METAPEX:\nIodoform, calcium hydroxide, oily additive.', 'role': 'assistant'}]