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: Medicine
The most common site of bleeding in Hemoptysis is 
Select and explain. 
A. Tracheobronchial tree, B. Pulmonary Parenchyma, C. Pleural Disease, D. All of the above
A: Tracheobronchial tree
Answer: A: Tracheobronchial tree 
Explanation: Answer is A (Tracheobronchial tree): The most common source of hemoptysis is the tracheobronchial tree. The most common site of hemoptysis within the tracheobronchial tree are small to medium sized airways. The most common site of bleeding is the tracheobronchial treeQ The most common site of hemoptysis is bleeding from the small to medium sized airways Q