Which of the following is/are possible consequences or co-morbidities of Chronic Obstructive Pulmonary Disease (COPD)?
W. Cor pulmonale
X. Respiratory acidosis
Y. Pulmonary hypertension
Z. Lung cancer
1) only W, X and Y are correct
2) only W and Y are correct
3) only X and Z are correct
4) only Z is correct
5) all are correct