This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Facial Injuries and Abnormalities, Subject name: Surgery
A man sustained injury and presented with fluid coming out through nose. What could be the possible fracture? 
Select and explain. 
A. Fracture base of skull, B. Fracture of mandible, C. Fracture of maxilla, D. None of the above
A: Fracture base of skull
Answer: A: Fracture base of skull 
Explanation: 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.