This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Mechanism of Calcitriol is: \nSelect and explain. \nA. Decreased calcium resorption from bone, B. Increase calcium absorption from intestine, C. Decreased calcium absorption from kidney, D. Decrease calcium absorption from intestine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]