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': 'Twitch of a single motor unit is called \nSelect and explain. \nA. Myoclonic jerk, B. Fasciculation, C. Tremor, D. Fibrillation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Contraction of a single muscle fiber is called fibrillation.Involuntary contractions of individual motor units are termed as fasciculations.Ref: Robbin&;s&; 9th edition; Chapter 28 The Central Nervous System', 'role': 'assistant'}]