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': 'The oral lesion called mucous patches is usually multiple, grayish white plaque associated with \nSelect and explain. \nA. Pain, B. No pain, C. Itching, D. Burning sensation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]