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 bases are contra indicated under\na composite resin restoration: \nSelect and explain. \nA. Calcium hydroxide, B. Eugenol base, C. Zinc phosphate cement, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]