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: Pathology
[{'content': 'Which one of the following is the cause of dilacerations? \nSelect and explain. \nA. Trauma to the tooth germ during root development, B. Abnormal displacement of tooth germ during root development, C. Abnormal proliferation of enamel epithelium during tooth development, D. Abnormal displacement of ameloblasts during tooth formation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]