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
[{'content': 'Corneal endothelial counting is done by? \nSelect and explain. \nA. Tachymetry, B. Pachymetry, C. Specular microscope, D. Perimetry', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Specular microscopeRef : Yanoff 3/d, p 83', 'role': 'assistant'}]