text: <unk> s are cerebrospinal fluid-filled sacs that are located between the brain or spinal cord and the<unk>  membrane, one of the three membranes that cover the brain and spinal cord.
option_0: Arachnoid cyst
option_1: Subdural hygroma
option_2: Choroid plexus papilloma
option_3: Choroidal fissure cyst
option_4: Acoustic neuroma
option_5: Craniopharyngioma
option_6: Meningioma
option_7: Cavernous sinus thrombosis