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': 'Examination of vitreous is best done by: \nSelect and explain. \nA. Direct ophthalmoscope, B. Indirect ophthalmoscope, C. Slit-lamp with contact lens, D. Oblique illumination', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Indirect ophthalmoscope', 'role': 'assistant'}]