This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
[{'content': "All are cavitating lesions in the lung except \nSelect and explain. \nA. Caplan's syndrome, B. Hamaoma, C. Wegner's granulomatosis, D. Squamous cell carcinoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Harrison 19 th ed pg 1794 Hamaomas produce non cavitating popcorn calcifications.', 'role': 'assistant'}]