__________ is always __________, while

__________ may be __________.
a. Exhalation; passive; inhalation; active
b. Inhalation; active; exhalation; passive
c. Inhalation; passive; exhalation; active
d. Exhalation; active; inhalation; passive
e. Exhalation; active; inhalation; active


Answer: b

Biology & Microbiology

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