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 commonest intrabronchial cause of haemoptysis is 
Select and explain. 
A. Carcinoma lung, B. Adenoma lug, C. Emphysema, D. Bronchiectasis
D: Bronchiectasis
Answer: D: Bronchiectasis 
Explanation: None