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': 'Cetuximab (an EGFR antagonist) can be used in ? \nSelect and explain. \nA. Palliation in head and neck cancer, B. Anal canal ca, C. Gastric ca, D. Lung ca', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Palliation in head neck cancer Uses of Cetuximab Head and neck cancer Colorectal cancer", 'role': 'assistant'}]