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': 'Most common cause of bleeding in children \nSelect and explain. \nA. Nose picking, B. Hypeension, C. Tumor, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Most common cause of nose bleeding in children - Trauma to the little's area. Fingernail trauma is common. Ref : Dhingra 7e pg 197.", 'role': 'assistant'}]