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: Medicine
[{'content': 'Probe used in western blot: \nSelect and explain. \nA. Antibody, B. M-RNA, C. DNA, D. t-RNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Antibody Western blot (immuno blot) analyses protein by antibody labeled probeQ. Nohern blot analyses m-RNA by a radioactive probe and southern blot analysis DNA by radioactive probe.', 'role': 'assistant'}]