This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
[{'content': 'What is ligament of lockwood related to \nSelect and explain. \nA. Gall bladder, B. Scrotum, C. Orbit, D. Lens', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) OrbitRef: Khurana Anatomy 2/e, p. 493It is a fascial expansion of the extraocular muscles formed by fusion of sheaths of MR, IR, LR, IO extending from the posterior lacrimal crest to the lateral orbital margin.', 'role': 'assistant'}]