Commonest intrabronchial cause of haemoptysis is
The two most common causes for haemoptysis are bronchitis and bronchiogenic carcinoma. Bronchitis is not provided amongst the options and hence bronchiogenic carcinoma is the single best answer of choice Ref Harrison 19th edition pg 227
Carcinoma lung
Adenoma lung
Emphysema
Bronchiectasis
Respiratory system