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': 'Superior parathyroid derived from \nSelect and explain. \nA. Mesoderm of 3rd pouch, B. Endoderm of 3rd pouch, C. Mesoderm of 4th pouch, D. Endoderm of 4th pouch', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]