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: Anatomy
[{'content': 'Parathyroid 4 means: \nSelect and explain. \nA. Inferior parathyroid., B. Superior parathyroid., C. Ultimobranchial pouch., D. None.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]