This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hydrocephalus, Subject name: Pediatrics
[{'content': 'Mac Ewan sign is seen in: \nSelect and explain. \nA. Hydrocephalus, B. Encephalitis, C. Meningitis, D. Microcephaly', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - In Hydrocephalus, percussion of the skull might produce a cracked pot sound or Mac Ewen sign, indicating separation of the sutures. - Large head with venous prominences & SETTING SUN SIGN are also seen', 'role': 'assistant'}]