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: Biochemistry
[{'content': 'Western blot is used for? \nSelect and explain. \nA. DNA, B. RNA, C. PROTEINS, D. mRNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]