This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2018, Subject name: Radiology
New born male baby presented with congestive hea failure. On examination enlarged fontanelles, a loud cranial bruit and following radiological finding was noted the mostly likely diagnosis:- 
Select and explain. 
A. Vein of Galen malformation, B. Dandy walker syndrome, C. Pneumocephalus, D. Crouzon syndrome
A: Vein of Galen malformation
Answer: A: Vein of Galen malformation 
Explanation: * The given image shows large midline cystic swelling and hydrocephalus in the baby* With the given information (large midline cystic swelling; hydrocephalus; congestive hea failure) it is clear that the given case is Vein of Galen malformation* Vein of Galen malformation is a misnomer as it is an AV malformation* Vein of Galen malformation is any malformation occurring at the level of great cerebral vein that causes midline cystic swelling * This large midline cystic swelling compresses the flow of CSF leading to Hydrocephalus and congestive hea failure