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': "If 'E' are lost due to caries at 8 years in a crowded mouth '5' will probably \nSelect and explain. \nA. Impact, B. Deflected palatally, C. Deflected buccally, D. Fail to erupt", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]