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': 'Mechanism of action of local anaesthetic is: \nSelect and explain. \nA. Stabilization of membrane, B. Inhibition of Ca, C. Inhibition of Mg+, D. Increasing dopamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Stabilization of membrane', 'role': 'assistant'}]