An airless state of pulmonary tissues caused by a bronchial tree obstruction is called?

To combat the shortage of organs available, scientists have been researching whether animal organs can be used, in a technique known as __________

Fill in the blank(s) with the appropriate word(s).

Which of the following terms refers to low platelet count?

a. leukopenia b. anemia c. thrombocytopenia d. neutropenia