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: Physiology
[{'content': 'Find out chronaxie and rheobase from the graph given below \nSelect and explain. \nA. Chronaxie 0.2 msec; rheobas 0.3V, B. Chronaxie 0.3V; rheobase 0.2 msec, C. Chronaxie 0.3V; rheobase 0.6V, D. Chronaxie 0.2 msec; rheobase 0.6V', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rheobase is the minimum stimulus strength that will produce a response. It corresponds to 0.3V Chronaxie is the minimum time duration for which a stimulus doubles the rheobase. Double the rheobase is 0.6V which corresponds to 0.2 msec.', 'role': 'assistant'}]