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': "Recurrent facial nerve palsy is a feature of: \nSelect and explain. \nA. Melkersson Rosenthal syndrome, B. Simpson Golabi syndrome, C. Down's syndrome, D. Klinefelter's syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: The rare Melkersson-Rosenthal syndrome consists of recurrent facial paralysis; recurrent--and eventually permanent--facial (paicularly labial) edema; and, less constantly, plication of the tongue. Its cause is unknown Ref: Harrison's principle of internal medicine 17th edition, chapter 371.", 'role': 'assistant'}]