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': "Eye lens dislocation seen in –a) Marfan\\'s syndromeb) Homocystinuriac) Down\\'s syndromed) Klinefelter syndrome \nSelect and explain. \nA. ac, B. a, C. ab, D. bc", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Marfan syndrome and homocystinuria can cause dislocation of lens.', 'role': 'assistant'}]