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: Anaesthesia
[{'content': 'End-tidal CO2 is increased to maximum level in : \nSelect and explain. \nA. Pul. embolism, B. Malignant hypehermia, C. Extubation, D. Blockage of secretion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Malignant hypehermia Unilateral absence (or decrease) of breath sounds over one lung (especially left) after a speedy intubation suggests a diagnosis of inadveent endobronchial intubation. End tidal CO2 may be low, normal or raised after an endotracheal intubation. Tlie presence of high end tidal CO2 however excludes a diagnosis of esophageal intubation which is associated with reduced or absent end tidal CO2. Malignant hypehermia show marked rise in ETCO2.', 'role': 'assistant'}]