What would you expect to see on pulmonary function testing when the patient has an obstructive pattern?

What would you expect to see on pulmonary function testing when the patient has an obstructive pattern?

1.Reduced diffusion capacity ,reduced FEV1/FVC ratio,total lung capacity reduced
2.Normal diffusion capacity ,normal FEV1/FVC ratio,total lung capacity increased
3.Reduced diffusion capacity ,reduced FEV1/FVC ratio,total lung capacity increased
4.Reduced diffusion capacity ,normal FEV1/FVC ratio,total lung capacity increased
5.Reduced diffusion capacity ,normal FEV1/FVC ratio,total lung capacity reduced

solu:

Obstructive disease such as asthma and COPD lead to reduced diffusion capacity, reduced FEV1/FVC ratio and increased lung volume. Restrictive diseases such as pulmonary fibrosis lead to reduced diffusion, normal FEV1/FVC ratio and reduced lung volume.