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
Calcitonin levels increased in 
Select and explain. 
A. Hypehyroidism, B. Hyperparathyroidism, C. Hypoparathyroidism, D. Cushing Syndrome
B: Hyperparathyroidism
Answer: B: Hyperparathyroidism 
Explanation: Calcitonin secretion is stimulated by increased serum calcium concentration and calcitonin protects against the development of hypercalcemia. Ref:- Ganong&;s review of medical physiology;