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': 'A child has microcephaly, Blue eyes, Fair skin, and Mental retardation, Ferric chloride test is positive. What is the likely diagnosis - \nSelect and explain. \nA. Phenylketonuria (PKU), B. Homocystinuria, C. Tyrosinosis, D. Alkaptonuria', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Phenylketonuria Clinical manifestations of phenylketonuria o Normal at bih o Symptoms occur after 1 months - i) Mental retardation ----> Not present at bih, develops gradually. ii) Neurological signs -4 Irritability, tremors, convulsions, hyperkinesis and muscular hypeonia & Exagerated reflex. iii) Blond hair, blue iris, fair skin. iv) Musty or mousy body odour. v) Vomiting vi) Microcephaly vii) Enamel hypoplasia & Growth retardation", 'role': 'assistant'}]