This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'Which dietary deficiency of a vitamin can cause Rickets. \nSelect and explain. \nA. Vitamin C, B. Niacin, C. Vitamin D, D. Biotin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Vitamin D (as 1,25-dihydroxycholecalciferol) is involved in calcium metabolism.A dietary deficiency of vitamin D causes rickets. Scurvy is caused by lack of vitamin C. Pellagra is caused by a dietary deficiency of niacin, and beriberi is caused by a lack of thiamine (vitamin B.,).', 'role': 'assistant'}]