This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
The most common benign tumor of the lung is 
Select and explain. 
A. Hamaoma, B. Alveolar adenoma, C. Teratoma, D. Fibroma
A: Hamaoma
Answer: A: Hamaoma 
Explanation: The most common benign lung tumor is a hamaoma,a developmental abnormality containing mesothelial & endothelial elements.Diagnosis is achieved by excision of the lesion. Reference:Bailey & Love's sho practise of surgery,25th edition,page no:891