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: Pharmacology
[{'content': 'Drug used in renal osteodystrophy: \nSelect and explain. \nA. Vitamin D, B. Calcitriol, C. Calcifediol, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) All of the aboveRef. Katzung 9th ed. /1028* Vitamin D has been used in treating renal osteodystrophy* In mild forms of malabsorption, vitamin D should suffice to raise serum levels of 25(OH) D into the normal range. Many patients with severe disease do not respond to vitamin D.* Calcitriol and Calcifediol have been used successfully in treatment of renal osteodystrophy and intestinal osteodystrophy.', 'role': 'assistant'}]