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
Which of the following statements about pulmonary hamartoma is true? 
Select and explain. 
A. It is the most common benign tumor of lung, B. More common in males, C. Chest X-ray shows "Pop corn calcification", D. All are true
D: All are true
Answer: D: All are true 
Explanation: None