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: Medicine
[{'content': 'Mechanism of action of Orlistat used to treat obesity is which of the following? \nSelect and explain. \nA. Central reuptake inhibitor of both norepinephrine and serotonin, B. Intestinal lipase inhibitor, C. Central reuptake facilitator of serotonin, D. Intestinal amylase inhibitor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sibutramine is central reuptake inhibitor of Noradrenaline and serotonin. Orlistat is a intestinal lipase inhibitor.', 'role': 'assistant'}]