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: Unknown
[{'content': 'In pseudocholinesterase deficiency, a drug to be used cautiously is - \nSelect and explain. \nA. Barbiturate, B. Succinylcholine, C. Halothane, D. Galiamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B', 'role': 'assistant'}]