<prompt> Stenosis of aqueduct of sylvius results in?Enlargement of lateral ventriclesEnlargement of fouh ventriclesEnlargement of lateral and third ventriclesEnlargement of lateral and fouh ventricles  <response>: Aqueduct of sylvius connects 3rd ventricle to the 4th one. Obstruction to Aqueduct of sylvius Enlargement of 3rd ventricle Dilatation of the ventricle proximal to the obstruction3rd ventricle 