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': "Krukenberg's spindle seen in patients with pigmentary glaucoma refers to deposition of pigment on: \nSelect and explain. \nA. Trabecular meshwork (gonioscopic sign), B. Back of cornea, C. Anterior surface of the lens, D. All of the above", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Back of cornea', 'role': 'assistant'}]