Which statements about chronic obstructive pulmonary disease (COPD) are correct?
1) The patient coughs a lot, bringing up mucus.
2) The patient’s symptoms normally do not change.
3) The patient is normally over 30 years old.
4) The disease can often be reversed by treatment.
1, 2 and 3 only
2 )
1, 2 and 4 only
3 )
2, 3 and 4 only
4 )
1, 2, 3 and 4
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