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: Medicine
[{'content': 'The most common cause of sudden death in sarcoidosis is \nSelect and explain. \nA. Pneumonia, B. Cor pulmonale, C. Arrythmias, D. Liver failure', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Arrhythmias", 'role': 'assistant'}]