This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Calcitonin levels increased in \nSelect and explain. \nA. Hypehyroidism, B. Hyperparathyroidism, C. Hypoparathyroidism, D. Cushing Syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Calcitonin secretion is stimulated by increased serum calcium concentration and calcitonin protects against the development of hypercalcemia. Ref:- Ganong&;s review of medical physiology;', 'role': 'assistant'}]