Correct answer:

Fractures through the petrous temporal bone may result in cerebrospinal fluid (CSF) otorrhoea, as CSF passes through into the external auditory meatus, either directly or via the mastoid air cells or middle ear in the presence of a ruptured tympanic membrane. If the tympanic membrane is intact, CSF rhinorrhoea occurs via the Eustachian tube. Involvement of the inner ear will result in deafness. Spontaneous resolution of the leak is usual.