A newborn presents with congestive heart failure,on examination has bulging anterior fontanellae with a bruit on ausculation.Transfontanellar USG shows a hypoechoic midline mass with dilated lateral ventricles.Most likely diagnosis is -

• A. Encephalocele
• B. Medulloblastoma
• C. Arachnoid cyst
• D. Vein of Galen malformation