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': 'Menadione is an analogue of \nSelect and explain. \nA. Vitamin C, B. Vitamin A, C. Vitamin D, D. Vitamin K', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ref: Ganong&;s review of medical physiology; 24th edition; page no;492 menadione C11H8O2(2-methyl-1,4-naphthoquinone) A compound used as a vitamin K supplement; impoant in blood clotting.', 'role': 'assistant'}]