This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Following tetanizing stimulus was to a muscle, there is a constant contraction. This is due to \nSelect and explain. \nA. Recruitment phenomenon, B. At high stimulus frequency all muscle fibers are contacting, C. Contraction of different muscle fibers at different places, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tetanization: as the frequency of the stimulus increases to a critical level the successive contractions become so rapid that whole muscle contraction becomes smooth and contineous This is called tetanization and frequency is tetanizing frequency Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:97', 'role': 'assistant'}]