Which of the following are used to confirm the diagnosis of COPD?
1. Presence of a chronic cough
2. Chronic exposure to environmental smoke
3. FEV1/FVC ratio greater than 0.70
4. FEV1 <80%
a. 1, 2
b. 3, 4
c. 1, 2, 3
d. 1, 3, 4
C
A chronic cough, chronic exposure to environmental smoke, and FEV1 below 80% are constant with COPD.
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