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': 'Infectious mononucleosis has: \nSelect and explain. \nA. Multiple draining sinuses, B. Ulcers which bruise easily, C. Palatal perforation, D. Alveolar bone loss', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]