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': 'The capsule of the crystalline lens is thinnest at – \nSelect and explain. \nA. Anterior pole, B. Posterior pole, C. Equator, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Capsule is thickest at → Pre-equator regions.\nCapsule is thinnest at →Posterior pole.', 'role': 'assistant'}]