This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System Disorders, Subject name: Pediatrics
[{'content': 'Open anterior fontanelle, bruit present. Midline lesion in brain diagnosis - \nSelect and explain. \nA. Malformation of vein of galen, B. Congenital hydrocephalus, C. Down syndrome, D. Rickets.', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Malformation of vein of galen o Open anterior fontanel seen in all 4 condition.o Cranial Bruits which is heard over anterior fontanel may be seen normally in children upto 4 years of age.o AV malformation of middle cerebral artery or vein of galen.o Severe anemia, raised intracranial pressure may also produce cranial bruit.", 'role': 'assistant'}]