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': "Dislocation of lens is seen in: \nSelect and explain. \nA. Trachoma, B. Diabetes mellitus, C. Homocystinuria, D. Turner's syndrome", 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Homocystinuria', 'role': 'assistant'}]