This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Which maneuver generally is not performed early before chest compression in basic life suppo outside the hospital? \nSelect and explain. \nA. Call for help, B. Obtain airway, C. Electrical cardioversion, D. Ventilation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Basic life suppo does involve calling for help, obtaining an airway, and beginning ventilation before staing chest compression. Electrical cardioversion requires special equipment and trained personnel and thus is pa of the advanced cardiac life suppo.', 'role': 'assistant'}]