This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': 'Sclera is thinnest at - \nSelect and explain. \nA. Limbus, B. Equator, C. Anterior to attachment of superior rectus, D. Posterior to attachment of superior rectus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thickness of sclera varies considerably in differentindividuals and with the age of the person. It isgenerally thinner in children than the adults and infemales than the males. Sclera is thickest posteriorly(1mm) and gradually becomes thin when tracedanteriorly. It is thinnest at the inseion of extraocularmuscles (0.3 mm). REF:Comprehensive ophthalmology,20th edition,AK Khurana,pg no.127.', 'role': 'assistant'}]