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': 'Staing material for production of insulin from bacteria is: \nSelect and explain. \nA. Genomic DNA from beta pancreatic cells of human, B. Genomic DNA from lymphocytes of human, C. mRNA from beta pancreatic cells of human, D. mRNA from lymphocytes of human', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. mRNA from beta pancreatic cells of human Staing material for production of insulin from bacterial cells (E.coli) using recombination DNA technology is mRNA from beta pancreatic cells of humanQ.', 'role': 'assistant'}]