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: Forensic Medicine
[{'content': 'Underwater autopsy of the hea is done in cases of: DNB 09 \nSelect and explain. \nA. Myocardial infarction, B. Pulmonary embolism, C. Air embolism, D. Pneumothorax', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Air embolism', 'role': 'assistant'}]