This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
[{'content': 'All are true regarding basal electrical rhythm of intestine except? \nSelect and explain. \nA. Tone of contraction is related to amplitude of stimulus, B. Tone of contraction is related to frequency of stimulus, C. Frequency of contraction is 6/min, D. Threshold of contraction is -50 mV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Tone of contraction is related to amplitude of stimulus(Ref: Ganong, 25th ed/p.497)Tone of contraction is proportional to the number and frequency of actional potentials and not the amplitude', 'role': 'assistant'}]