This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'The most common site for CSF rhinnorhea from a dural fistula is which of the following? \nSelect and explain. \nA. Ethmoidal sinus, B. Frontal sinus, C. Petrous, D. Cribriform plate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The most common site for dural fistula is in the anterior cranial fossa, in the area of the cribriform plate. Here, the bone is very thin and the dura is tightly adherent to the bone. A fracture in this area allows CSF to leak through torn arachnoid and dura into the nasal cavity, resulting in CSF rhinorrhoea.', 'role': 'assistant'}]