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': 'Synchysis means \nSelect and explain. \nA. Pale bony disc, B. Detachment of vitreous, C. Liquefaction of the vitreous, D. Black spots in front of the eyes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Synchysis means Liquefaction of the vitreous.', 'role': 'assistant'}]