This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
[{'content': 'Nohern blotting used in separation and diagnosis of: \nSelect and explain. \nA. Histones, B. Proteins, C. RNA, D. DNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: HISTONES No blotting technique PROTEINS Western blotting RNA Nohern blotting DNA Southern blotting', 'role': 'assistant'}]