What is the purpose of a bronchoscope?

The primary purpose of a bronchoscope is to examine the bronchus, which is part of the respiratory system. This instrument is inserted into the trachea and allows healthcare providers to directly observe the airways, including the bronchi, for any abnormalities or conditions such as inflammation, infection, or tumors.

While a bronchoscope can also be utilized for procedures like biopsies, which involve taking tissue samples, its fundamental design and purpose center around visualization of the bronchial tubes. This capability is crucial for diagnosing various pulmonary diseases and guiding treatment options, making it an essential tool in respiratory medicine.

The other options present functions that do not pertain to the use of a bronchoscope, which distinguishes option B as the correct choice.