This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': 'Attachement of Vitreous is Srongest at ? \nSelect and explain. \nA. Foveal region, B. Back of lens, C. Across ora serrata, D. Margin of optic disc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The pa of the vitreous about 4 mm across the ora serrata is called as vitreous base, where the attachment of the vitreous is strongest. Ref comprehensive ophthalamology AK Khurana 4th edition page no:243.', 'role': 'assistant'}]