One of the following condition Is not associated with clubbing: (A) Primary biliary cirrhosis, (B) Chronic bronchitis, (C) Ciyptogenic fibrosing alvcolitis, (D) Central bronchiectasis
Answer is B. Chronic bronchitis does not cause clubbing Pulmonary causes of clubbing: primary and metastatic lung cancer bronchiectasis asbestosis sarcoidosis lung abscess cystic fibrosis tuberculosis mesothelioma other causes include inflammatory bowel disease,infective endocarditis,cyanotic congenital hea disease ,hepatic cirrhosis etc