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: Medicine
[{'content': 'TTKG in hypokalemia is - \nSelect and explain. \nA. < 3-4, B. > 6-7, C. > 9-10, D. > 10-15', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. < 3-4A normal TTK in normal subjects on normal diet is 8-9Without other disease, hypokalemia should produce a TTKG <3', 'role': 'assistant'}]