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': 'Small opacities in the media of the eye are best detected by: \nSelect and explain. \nA. Distant direct ophthalmoscopy, B. Direct ophthalmoscopy, C. Indirect ophthalmoscopy, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Distant direct ophthalmoscopy', 'role': 'assistant'}]