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': 'How is a two year old positioned for an emergency\nexamination of a fractured incisor? \nSelect and explain. \nA. On the dental assistants Lap, B. On the parents lap, C. On the dental chair, D. In the papoose board', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]