This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
[{'content': 'The following ETC02 curve depicts what \nSelect and explain. \nA. spontaneous effos, B. bronchos pasm, C. Esophageal intubation, D. Accidental extubation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: curare notch ref : willey 10th ed', 'role': 'assistant'}]