How many secondary (lobar) bronchi are there in the right lung?

In the right lung, there are typically three secondary (lobar) bronchi, each corresponding to one of the three lobes: the upper lobe, middle lobe, and lower lobe. This anatomical structure allows for efficient airflow and gas exchange within the lung regions, as each lobe has its own bronchus branching off from the main bronchus.

Considering the choices provided, the number of secondary bronchi is three, which is not among the options given. However, the presence of 10 in one of the choices might suggest a misunderstanding or error in the question if interpreted to mean total bronchi, including primary, secondary, and tertiary branches collectively across both lungs. It's essential to focus on the known anatomical fact regarding the lobar bronchi specifically when referring to their number within the right lung solely. The correct understanding leads to recognizing that the right lung has three secondary bronchi.