The death of lung tissue that may result from an obstruction of the pulmonary artery is called a:

a. pulmonary embolism.
b. pleural effusion.
c. pulmonary infarction.
d. pulmonary empyema.

C
A pulmonary infarction causes the death of lung tissue. This can happen when a pulmonary embolism (a clot that moves from another part of the body to the lung) significantly disrupts pulmonary blood flow. A pleural effusion is the leakage of fluid into the pleural space around a lung. An empyema is the accumulation of pus in the pleural space.