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': 'Thickest poion of sclera is ? \nSelect and explain. \nA. Anterior to rectus muscle inseion, B. Posterior to rectus muscle inseion, C. Posterior pole, D. Limbus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Posterior pole o The thickness of the sclera varies according to location : ? At the limbus, the sclera is 0.8 mm thick. Anterior to the rectus muscle inseions, it is 0.6 mm thick. Posterior to the rectus muscle inseions, it is 0.3 mm thick (Thinnest poion). At the equator, it is 0.5 to 0.8 mm thick. At the posterior pole, it is greatest than 1 mm thick.", 'role': 'assistant'}]