This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Infra 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: Ans. is 'a' i.e., Intubation & laryngoscopy Laryngoscopy and intubation of trachea can dramatically increase intraocular pressure to a values as high as 40 mm Hg. Administration of intravenous lignocaine prior to intubation has been found to prevent an increase in IOR IOP changes with LMA inseion are less than those following tracheal intubation.