In which of the following conditions there is an increase in lung diffusion capacity?: (A) Emphysema, (B) Idiopathic pulmonary fibrosis, (C) Alveolar haemorrhage, (D) Pulmonary oedema
Answer is C. DLCO is increased in alveolar hemorrhage whereas it decreases in pulmonary edema, idiopathic pulmonary fibrosis, emphysema.