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': 'Intravenous thiopentone pentox, produces \nSelect and explain. \nA. Rash, B. Pain, C. Spasm, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Rash; B i.e. Pain; C i.e. Spasm', 'role': 'assistant'}]