Final answer:
The medical device you are asking about is the Bonfils retromolar, which is an endoscope type used for various medical procedures such as surgeries and diagnostics within the body.
Option 3 is correct.
Step-by-step explanation:
The 40-cm long, rigid optical style you are referring to with a fixed anterior tip curvature of 40 degrees that is available with a working channel for suction, local anesthesia, or oxygen insufflation is named the Bonfils retromolar. Endoscopes, like the one mentioned in your question, are crucial medical instruments used to examine internal body structures by transferring light down fiber optic bundles. These devices allow for both diagnostic and therapeutic procedures, such as the removal of intestinal polyps or arthroscopic surgery. In medical settings, an endoscope provides a way for physicians to navigate through the body's various orifices or minor incisions to illuminate and obtain live images of internal parts, much like navigating a space capsule with tools for specific functions.