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': 'mRNA is a complimentary copy of ? \nSelect and explain. \nA. TRNA, B. RRNA, C. Ribosomal DNA, D. A single strand of DNA', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. A single strand of DNA', 'role': 'assistant'}]