This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Vitamin A is stored in \nSelect and explain. \nA. Retina, B. Liver, C. Bone, D. Kidney', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The liver contains ~90% of the vitamin A reserves and secretes vitamin A in the form of retinol, which is bound to retinol binding protein.Ref: Harrison&;s Principles of Internal Medicine; 19th edition; Chapter 96e; Vitamin and Trace Mineral Deficiency and Excess', 'role': 'assistant'}]