<prompt> Endolymphatic duct connects which structureScala media to epidural spaceScala vestibule to aqueduct of cochleaScala tympani to aqueduct of cochleaScala tympani to subdural space  <response>: Endolymphatic duct formed by the union of two ducts, one each from saccule and utricle. Surgically it is exposed for the drainage or shunt operation in Meniere;s disease. Reference Dhingra 6th edition 