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': 'Mitochondria havea) Plasmid DNAb) Circular DNAc) Single stranded DNAd) Double stranded DNA \nSelect and explain. \nA. bd, B. d, C. ab, D. ac', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mitochondrial\xa0DNA is small\xa0circular double stranded DNA\xa0molecule.', 'role': 'assistant'}]