This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypercalcemia and Hypocalcemia, Subject name: Medicine
[{'content': 'A patient presents with decreased calcium, decreased phosphate and increased alkaline phosphatase. Diagnosis is - \nSelect and explain. \nA. Hyperparathyroidism, B. Vitamin D deficiency, C. Osteoporosis, D. Chronic renal failure', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Vitamin D deficiency Changes in vitamin D deficiency (Osteomalacia or Rickets)o Serum Ca++-Normal to decreaseo Serum P04-Decreasedo Alkaline phosphatase -Increasedo PTH -N/increase Serum CaSerum phosohorusAlkaline PhosphatasePTHPrimary Hyperparathy roiriismIncreaseDecreaseIncreaseIncreaseSecondary' hyper parathyroidismDecrease or NIncreaseIncreaseIncreaseOsteoporosisNNNNPaget's diseaseNNIncreaseNOsteomalacia (Vitamin D deficiency)DecreaseIncrease/ decreaseIncreaseN/Increase", 'role': 'assistant'}]