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: Pediatrics
[{'content': 'Which one of the following is not a feature of Phenylketonuria? \nSelect and explain. \nA. Severe mental retardation, B. Reduced tendon reflexes, C. Enamel hypoplasia, D. Vomiting in early infancy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., Reduced tendon reflexesReflexes are hyperactive.", 'role': 'assistant'}]