This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, 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. Capsule is thinnest at -Posterior pole. Ref: Khurana 7th/e p.185&4th/e p.167)', 'role': 'assistant'}]