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': 'Commonest cause of epistaxis in children is \nSelect and explain. \nA. Trauma, B. Foreign body, C. Nasal diphtheria, D. Enlarged adenosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Commonest cause of epistaxis in children is trauma in Little&;s area', 'role': 'assistant'}]