This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
Which Endotracheal tube has preformed bend present- 
Select and explain. 
A. Laser tube, B. RAE tube, C. Flexometallic tube, D. Standard tube
B: RAE tube
Answer: B: RAE tube 
Explanation: RAE tube with preformed bend is used for cleft lip n palate surgery. RAE- ETT Shaped for nasal and oral intubations Useful for directing ETT & circuit away from surgical field May make suctioning difficult The nasal RAE is often used for oral surgery or mandibular Fx for ORIF. The oral RAE is used in any surgery to facilitate directing the tubes away from the surgical field above the neck (ophthalmology, ENT or facial surgery) or for T&A with the mouth gag.