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': 'Causes of epistaxis are all except \nSelect and explain. \nA. Allergic rhinitis, B. Foreign body, C. Tumour, D. Hypeension', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes of epistaxis Trauma Infections Foreign bodies Neoplasms of nose and paranasal sinus Atmospheric changes Deted nasal septum Hypeension Pregnancy Leukemia Liver disease Kidney disease Idiopathic Ref: Dhingra 7e pg 197.', 'role': 'assistant'}]