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': 'Gemcitabine is 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: Ans. is 'b' i.e., Pancreatic cancer o Gemcitabine is the DOC for pancreatic carcinoma.", 'role': 'assistant'}]