This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative assessment and monitoring in anaesthesia, Subject name: Anaesthesia
[{'content': 'Sudden decreasd end tidal CO2 in GA causes \nSelect and explain. \nA. Cardiac arrest, B. Pulmonary hypeension, C. Malignant hypehermia, D. Malignant extubation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Complications of Anaesthesia During anaesthesia: > Respiratory depression - Salivation, respiratory secretions > Cardiac arrhythmias > Fall in BP >Aspiration >Laryngospasm and >asphyxia >Awareness > Delirium and convulsion > Fire and explosion', 'role': 'assistant'}]