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': 'Turner hypoplasia is: \nSelect and explain. \nA. Hypoplasia due to local trauma/infection, B. Hypoplasia due to systemic infection, C. Hypoplasia due to congenital syphilis, D. Hypoplasia due to fluoride ingestion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]