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: Physiology
[{'content': 'Which of these can cause hypocalcemia: \nSelect and explain. \nA. Thyroxine, B. Calcitonin, C. Calcitonin, D. Choloecalciferol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. CalcitoninCalcitonin, a hormone secreted by parafollicular cells or C cellQ of thyroid gland, lowers the serum calcium levelQ. Effect of Hormone on Calcium & Phosphate LevelHormoneSerum CalciumSerum phosphateVit DIncreasesQIncreaseQPTHIncreasesQDecreaseQCalcitoninDecreasesQDecreaseQ', 'role': 'assistant'}]