This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
Corneal endothelial counting is done by? 
Select and explain. 
A. Tachymetry, B. Pachymetry, C. Specular microscope, D. Perimetry
C: Specular microscope
Answer: C: Specular microscope 
Explanation: Ans. (c) Specular microscopeRef : Yanoff 3/d, p 83