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': 'Thinnest pa of lens is \nSelect and explain. \nA. Anterior pole, B. Posterior pole, C. Posterior capsule, D. Apex', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lens capsule is a thin, transparent, hyaline membrane surrounding the lens which is thicker over the anterior than the posterior surface. The lens capsule is thickest at pre-equator regions(14u) and thinnest at the posterior pole (3u) Ref;A.K.Khurana; 6th edition; Page no:179', 'role': 'assistant'}]