This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Techniques of Ocular Examination and Diagnostic Tests, Subject name: Ophthalmology
[{'content': 'Which of the following instruments is shown below? \nSelect and explain. \nA. Retinoscope, B. Direct ophthalmoscope, C. Indirect ophthalmoscope, D. Slit lamp biomicroscope', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Slit lamp biomicroscope.', 'role': 'assistant'}]