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': 'Erlotinib is used in - \nSelect and explain. \nA. Erlotinib is used in -, B. Pancreatic cancer, C. Gall bladder cancer, D. GIST', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pancreatic cancer", 'role': 'assistant'}]