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: Surgery
[{'content': "Premalignant conditions of the skin include - \nSelect and explain. \nA. Bowen disease, B. Paget' s disease of nipple, C. Leukoplakia, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., All of the above", 'role': 'assistant'}]