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
[{'content': 'Which of the following is NOT TRUE regarding PROPOFOL ? \nSelect and explain. \nA. It is used in day care anesthesia, B. It is contraindicated in porphyria, C. Commercial preparation contains egg extract, D. It does not cause airway irritation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ketamine is safe in porphyria.', 'role': 'assistant'}]