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
[{'content': 'Disadvantage of ketamine is \nSelect and explain. \nA. Increased hea rate, B. Increased ICT, C. Delirium, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: When administered to adult patients as a sole anaesthetic agent, ketamine frequently causes emergency reaction characterized by anxiety, hallucination, delirium. Moreover, ketamine shows cardiovascular stimulant propey (increases hea rate and BP), increases salivary and bronchial secretions, and may increase intracranial, intraocular and pulmonary pressure. All of these features have been advocated as limitations for its usefulness.(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.294)", 'role': 'assistant'}]