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': 'The aqueous flare is best demonstrated by: \nSelect and explain. \nA. Biomicroscope, B. Keratoscope, C. Pentoscope, D. Ophthalmoscope', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Biomicroscope', 'role': 'assistant'}]