This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Intra ocular pressure rises in 
Select and explain. 
A. Intubation & laryngoscopy, B. LMA, C. Infusion of IV propofol, D. Bag and mask ventilation
A: Intubation & laryngoscopy
Answer: A: Intubation & laryngoscopy 
Explanation: Laryngoscopy and intubation of trachea can dramatically increase intraocular pressure to a value as high as 40mm Hg.Administration of intravenous lignocaine prior to intubation has been found to prevent an increase in IOPIOP changes with LMA inseion are less than those following tracheal intubation.(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition, pg no 325-331)