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: Medicine
All are cavitating lesions in the lungs, except 
Select and explain. 
A. Caplan's syndrome, B. Hamartoma, C. Wegner's granuloma, D. Squamous cell carcinoma
B: Hamartoma
Answer: B: Hamartoma 
Explanation: None