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': 'Attachment of vitreous is strongest at: September 2012 \nSelect and explain. \nA. Foveal region, B. Back of lens, C. Around ora serrata, D. Margin of optic disc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Around ora serrata', 'role': 'assistant'}]