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': 'Hemorrhage in vitreous humour is caused by all of the following except: March 2010 \nSelect and explain. \nA. Diabetes mellitus, B. CRVO, C. Glaucoma, D. Trauma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Glaucoma', 'role': 'assistant'}]