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: Pathology
[{'content': 'Symmetrical persistent enlargement of the parotid gland is seen in: \nSelect and explain. \nA. Sjogren syndrome., B. Cylindroma., C. Mickuliz disease., D. All of the above.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]