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': 'Thickness of wax in inter occlusal records \nSelect and explain. \nA. 9 mm, B. 2 mm, C. 2 cm, D. 10 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]