This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
[{'content': 'Mitochondrial DNA is: \nSelect and explain. \nA. Circular double stranded, B. Circular single stranded, C. Linear double helix, D. None of these', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans A. Circular double strandedMitochondria and chloroplast are the only two semi -autonomous organelles present in the cell. And DNA present is circular double stranded.', 'role': 'assistant'}]