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: Microbiology
[{'content': 'The segment of DNA between chromosomal and extrachromosomal DNA molecules within the cells are \nSelect and explain. \nA. Transposons, B. Cosmid, C. Plasmid, D. Episomes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]