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': 'Thinnest poion of sclera ? \nSelect and explain. \nA. Anterior to rectus muscle inseion, B. Posterior to rectus muscle inseion, C. Posterior pole, D. Limbus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is.b, Posterior to rectus muscle inseion Thinnest poion of sclera- Posterior to inseions of rectus muscle. Thickest poion of sclera- Posterior pole.', 'role': 'assistant'}]