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: Pathology
[{'content': 'Sloughing of necrotic epithelium is characteristic of: \nSelect and explain. \nA. Aspirin burn, B. Denture sore mouth, C. Traumatic ulcer, D. Contact dermatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]