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: Unknown
[{'content': 'Which maneuver generally is not performed early before chest compression in basic life support 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 support does involve calling for help, obtaining an airway, and beginning ventilation before starting chest compression. Electrical cardioversion requires special equipment and trained personnel and thus is part of advanced cardiac life support', 'role': 'assistant'}]