Pulmonary crackles are frequently heard in?: (A) Pneumothorax, (B) Pulmonary fibrosis, (C) Pleural effusion, (D) Lung cancer (secondary)
Answer is B. Ans. B. Pulmonary fibrosisCrackles are produced by fluid in alveoli or by fibrotic airways. Therefore, they can be heard in patients with pulmonary fibrosis or congestive heart failure.