Question

which is the first branching of the trachea? a.) secondary bronchi b.) primary bronchi c.) primary bronchioles d.) tertiary bronchi

Explanation:

The trachea first branches into the primary bronchi (also known as the main bronchi). The primary bronchi then further branch into secondary bronchi, which branch into tertiary bronchi, and so on until reaching the bronchioles.

Answer:

B. Primary bronchi