This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Neoplastic Agents, Subject name: Pharmacology
[{'content': 'Which of the following drug is NOT effective against chemotherapy induced vomiting? \nSelect and explain. \nA. Aprepitant, B. Hyoscine, C. Metoclopramide, D. Ondansetron', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) HyoscineRef: KDT 6th ed. / 646-47', 'role': 'assistant'}]