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': 'Calcitionin is secreted from - \nSelect and explain. \nA. Ancinar cells of thyroid, B. Chief cells of parathyroid, C. C cells of thyroid, D. Oxyphil cells of parathyroids', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]