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: Radiology
All of the following produce cavitating nodules in the lung except 
Select and explain. 
A. Sqamous cell CA, B. Caplan's syndrome, C. Hamaoma, D. Silicosis
C: Hamaoma
Answer: C: Hamaoma 
Explanation: C i.e. Hamaoma Hamaoma produces noncavitating popcorn calcificationQ. Various infections, neoplasms, granulomatous lesions (wegner's rheumatoid-caplan's, pneumoconiosis, traumatic & vascular infarcts) produce cavitatory lesions.