This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'Debucain number refers to \nSelect and explain. \nA. Ach cholinestrase activity derangement, B. Potency of muscle relaxants, C. Potency of general anaesthetics, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: DIBUCAINE NUMBER * The Dibucaine Number is a measure of the qualitative activity of Pseudo cholinesterase and is the percentage of inhibition of the enzyme by the local anesthetic Dibucaine. * It is used to differentiate individuals who have substitution mutations of the Butryl cholinesterase enzyme', 'role': 'assistant'}]