Restrictive lung disease relationship with lung function tests?

what is the difference between obstructive pulmonary diseases (COPD, asthma) and restrictive pulmonary diseases (pulmonary fibrosis), and how these differences impact pulmonary function tests.

ection Section 2 133 of 145 133. Which of the following patterns of oxygen saturation most likely represents those obtained from a normal fetus (1 representing the highest saturation and 4 representing the lowest saturation)? A) OB) OC) OD) OE) Umbilical Vein 1 Inferior Vena Cava at the Diaphragm 2 2 3 Superior Vena Cava 3 2 4 2 Left Atrium 4 3 3 3 2

Spirometry and Methacholine challenge test are used to diagnose cough. Discuss briefly when these two types test's are used?  Your answer should include common causes,types and symptoms of cough. Please explain at your own words.