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
Causes of a cavitating lesion in the chest radiograph are all except: 
Select and explain. 
A. Hamaoma, B. Pulmonary infarction, C. Squamous carcinoma of the bronchus, D. Caplan's syndrome
A: Hamaoma
Answer: A: Hamaoma 
Explanation: Ans. Hamaoma