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': 'Which of the following anti emetic acts by stimulating cannabinoid - 1 (CB1) receptors \nSelect and explain. \nA. Aprepitant, B. Dronabinol, C. Apomorphine, D. Prucalopride', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dronabinol is an anti - emetic which acts by stimulating Cannabinoid -1 receptors which also can stimulate appetite.', 'role': 'assistant'}]