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': 'CSF Rhinorrhea occurs d/t \nSelect and explain. \nA. Roof of orbit, B. Frontal sinus, C. Cribriform plate of ethmoid bone, D. Sphenoid bone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Commonest area of # causing CSF Rhinorrhea → cribriform plate of ethmoid bone as it is extremely thin.\nOther possible areas of # causing CSF Rhinorrhea Frontal sinus (Posterior wall) or of the anterior cranial fossa.\nDifference between CSF Rhinorrhea & allergic or vasomotor rhinitis CSF contains glucose which can be demonstrated by chemical tests.\nCSF when collected into a test tube and allowed to stand, it remains clear in contradistinction to nasal discharge that leaves a sediment because of mucus and other proteins.\nNasal discharge stiffens the handkerchief and CSF dries soft in it.\nTreatment: Prophylactic antibiotics & X-ray * If more than 2 wks then correct it surgically.', 'role': 'assistant'}]