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': 'White lesion with definite precancerous potential \nSelect and explain. \nA. Leukoplakia, B. Discoid lupus Erythematosus, C. Lichen Planus, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]