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: Biochemistry
[{'content': 'Na channel mediated TTXN resistant caused is d\nto involvement of the following: \nSelect and explain. \nA. Nav 1.1, B. Nav 1.8, C. TRPI, D. NMD4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]