This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'GemciGemitis effective in \nSelect and explain. \nA. Head and neck cancers, B. Pancreatic cancer, C. Small cell lung cancer, D. Soft tissue sarcoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref-Katzung 10/891 Gemitabine is an antimetabolite that is the drug of choice for pancreatic cancer', 'role': 'assistant'}]