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: Medicine
[{'content': 'All are manifestations of tuberous sclerosis, EXCEPT: \nSelect and explain. \nA. Retinal hamaomas, B. Pulmonary lymphangioleiomyomatosis, C. Posterior embryotoxon, D. Renal angiomyolipomas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Internal manifestations of tuberous sclerosis include seizures, mental retardation, central nervous system (CNS) and retinal hamaomas, pulmonary lymphangioleiomyomatosis (women), renal angiomyolipomas, and cardiac rhabdomyomas. Ref:Harrisons Principles of Internal Medicine, 18th Edition, Page 410', 'role': 'assistant'}]