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': 'In molecular cloning, Blue-white screening is used for: \nSelect and explain. \nA. To screen for recombinant vectors, B. To detect gene mutations, C. To identify desired chromosomal DNA inse in plasmid vectors, D. To detect host DNA in situ', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. To identify desired chromosomal DNA inse in plasmid vectors.', 'role': 'assistant'}]