This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune Skin Disorders, Subject name: Skin
[{'content': 'Toxic epidermal necrolysis (TEN) involves body surface area - \nSelect and explain. \nA. < 10%, B. 10-20%, C. 20-30%, D. > 30%', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., > 30%", 'role': 'assistant'}]