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
An unconcious patient of head injury comes in casualty. On examination shows raised intracranial pressure. Which anesthetic agent is contraindicated: 
Select and explain. 
A. Thiopentone, B. Propofol, C. Ketamine, D. Etomidate
C: Ketamine
Answer: C: Ketamine 
Explanation: C i.e. Ketamine Ketamine causes increase in all pressure i.e. intracranial, intraocular, intragastric and intravascular (Blood) pressure. So it is not used in raised ICT/IOT & Hypeension as it may increase the pressure to morbid levels.