<prompt> CSF otorrhoea is caused byFracture of cribriform plateFractureof parietal boneFractureof petrous temporal boneFracture of tympanic membrane  <response>: Ans is c ie Fracture of petrous temporal boneC.S.F. otorrhea is seen in fracture longitudinale of temporal bone C.S.F. is seen in external and middle ears TT -It usually ceases spontaneously surgical intervention is rarely needed. Antibiotics Co-trimoxazole is given as it us sensitive to bacter ious causing URTI and it can cross blood brain barrier. 