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
Which of the following instruments is shown below? 
Select and explain. 
A. Retinoscope, B. Direct ophthalmoscope, C. Indirect ophthalmoscope, D. Slit lamp biomicroscope
D: Slit lamp biomicroscope
Answer: D: Slit lamp biomicroscope 
Explanation: Ans. (d) Slit lamp biomicroscope.