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: Surgery
The most common benign tumor of the lung is - 
Select and explain. 
A. Hamartoma, B. Alveolar adenoma, C. Teratoma, D. Fibroma
A: Hamartoma
Answer: A: Hamartoma 
Explanation: None