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': 'Vitamin acting on intranuclear receptors- \nSelect and explain. \nA. Vitamin K, B. Vitamin D, C. Vitamin B1, D. Vitamin E', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mechanism of action of vitamin D resembles group II hormones i.e. it binds with nuclear receptors.', 'role': 'assistant'}]