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': 'Posterior epistaxis is commonly seen in: \nSelect and explain. \nA. Children with ethmoidal polyps, B. Foreign bodies of the nose, C. Hypeension, D. Nose picking', 'role': 'user'}, {'content': 'Answer: C \nExplanation: M/c cause of epistaxis in adults is hypeension M/c site - Woodruff area Causes posterior epistaxis', 'role': 'assistant'}]