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': "Marfan's s syndrome associated with? \nSelect and explain. \nA. Retinal detachment, B. Vitreous hemorrhage, C. Ectopia lentis, D. Roth spots", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ectopia lentis REF: Khurana 4th ed p. 422, Pediatric ophthalmology: A clinical guide by Pamela Gallin Table 8-7 Repeat in June 2010 "Marfan\'s syndrome is the most common cause of subluxated lens of childhood" Differential diagnosis of dislocated/subluxated lens: Trauma Ectopia lentis et pupillae Aniridia Syphilis Megalocornea (X linked recessive) Marfan\'s syndrome Homocystinuria Hyperlysinemia Sulfite oxidase deficiency Weill- Marchesani', 'role': 'assistant'}]