This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
The most common site for CSF rhinorrhoea is - 
Select and explain. 
A. Ethmoidal sinuses, B. Maxillary sinuses, C. Frontal sinus, D. Tegmen tympani
A: Ethmoidal sinuses
Answer: A: Ethmoidal sinuses 
Explanation: 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)