This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pharmacology
[{'content': 'Which of the following is an antagonist of a peptide and is used to reduce chemotherapy induced nausea and vomiting? \nSelect and explain. \nA. Atrial natriuretic peptide, B. Aprepitant, C. Bradykinin, D. Enalapril', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This drug is an antagonist of substance p.it is paicularly useful in delayed phase of chemotherapy induced vomiting.(ref Goodman and Gilman 11/e p1005)', 'role': 'assistant'}]