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': 'Western blot technique is done for \nSelect and explain. \nA. Mitochondrial RNA, B. Double strand DNA, C. r- RNA, D. Protein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Protein', 'role': 'assistant'}]