This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Genetic Syndromes, Subject name: Pediatrics
[{'content': 'Not seen in William syndrome? \nSelect and explain. \nA. Elfin facies, B. Subvalvular aoic stenosis, C. Hypercalcemia, D. Hypeension', 'role': 'user'}, {'content': "Answer: B \nExplanation: William's syndrome- Supravalvular aoic stenosis Intellectual disability Sho stature Hypercalcemia and hypeension Face of a child with 'elfin facies' -small upturned nose, long philtrum, wide mouth, full cheeks, full lips, small chin, and puffiness around the eyes.", 'role': 'assistant'}]