Final answer:
The Levitan first pass success is not a rigid fiberoptic stylet, while the Shikani optical stylet, Bonfils retromolar intubation fiberscope, and Bullard laryngoscope are examples of rigid fiberoptic stylets.
Step-by-step explanation:
The correct answer is 2) Levitan first pass success. The Levitan first pass success is a stylet-assisted technique for intubation, but it is not a rigid fiberoptic stylet. Rigid fiberoptic stylets are used for difficult airway management and contain a fiberoptic light source that helps visualize the airway during intubation.
On the other hand, the Shikani optical stylet, Bonfils retromolar intubation fiberscope, and Bullard laryngoscope are all examples of rigid fiberoptic stylets. They are designed to provide a better visualization of the airway during intubation and improve the chances of successful intubation.