<prompt> A 5-year-old boy presents with recurrent headaches. As pa of his assessment, he undergoes an MRI scan of his brain. This demonstrates enlargement of the lateral and third ventricles. Where is the most likely site of obstruction?Foramen of LuschkaForamen of MagendieForamen of MunroAqueduct of Sylvius  <response>: NameFromTointerventricular foramina Monrolateral ventriclesthird ventriclecerebral aqueduct Sylviusthird ventriclefouh ventriclemedian apeure Magendiefouh ventriclesubarachnoid space the cisterna magnaright and left lateral apeure Luschkafouh ventriclesubarachnoid space the cistern of great cerebral vein 