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
[{'content': 'The most common site of the leak in CSF rhinorrhea is \nSelect and explain. \nA. Sphenoid sinus, B. Frontal sinus, C. Cribriform plate, D. Tegmen tympani', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CSF rhinorrhea- Commonest site- Lateral lamella of cribriform plate of the ethmoidOther sites- Roof of ethmoids, posterior wall of the frontal sinus, Sphenoid sinusThe commonest cause of CSF rhinorrhoea- Iatrogenic TraumaRef: Hazarika; 3rd ed; Pg 361', 'role': 'assistant'}]