Indications for spirometry include which of the following? 1. Preoperative evaluation for pneumonectomy 2. Measurement of exercise capacity 3. Determination of the beneficial effects of a...

1. Preoperative evaluation for pneumonectomy

2. Measurement of exercise capacity

3. Determination of the beneficial effects of a bronchodilator

4.Measurement of the effects of working in a dusty environment

a. 1, 2, and 3

b. 1, 3, and 4

c. 2, 3, and 4

d. 2 and 4 only