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': 'In vitreous base detachment, vitreous body is detached from its attachment with the: \nSelect and explain. \nA. Optic disc, B. Ora-Serrata, C. Posterior surface of the lens, D. Fovea centralis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Ora-Serrata', 'role': 'assistant'}]