<prompt> A man sustained injury and presented with fluid coming out through nose. What could be the possible fracture?Fracture base of skullFracture of mandibleFracture of maxillaNone of the above  <response>: BASILAR SKULL FRACTURE Fracture of the base of the skull, typically involving the temporal bone, occipital bone, sphenoid bone, and or ethmoid bone. Leaking fluid may accumulate in the middle ear space, and dribble out through a perforated eardrum CSF otorrhea or into the nasopharynx the Eustachian tube, causing a salty taste. CSF may also drip from the nose CSF rhinorrhea in fractures of the anterior skull base, yielding a halo sign. These signs are pathognomonic for basilar skull fracture. 