A total obstruction of air into the lungs is possible if the is blocked a. trachea
b. left bronchus
c. bronchus
d. bronchiole

A

Explanation:

The trachea is the main airway passage in order to get to the bronchi and bronchioles to do the proper air exchange. If you block that, pretty much you won't have air passing by and that causes distress on the body.

the answer is:

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