The most common site for CSF rhinorrhoea is -
The most common site of traumatic CSF rhinorrhoea is the fracture of that pa of the cribriform plate which forms the roof of the ethmoid sinus. (Ref: Cummings, 6th edition, pg no. 804)
Ethmoidal sinuses
Maxillary sinuses
Frontal sinus
Tegmen tympani
Nose and paranasal sinuses