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: Ophthalmology
[{'content': 'Persistent hyperplastic primary vitreous is associated with \nSelect and explain. \nA. Trisomy 13, B. Trisomy 21, C. Trisomy 5, D. Monosomy 1', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Associated with patau syndrome (Trisomy 13).', 'role': 'assistant'}]