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: Pathology
[{'content': 'Leber hereditary optic neuropathy ELHUNI is caused by mutation in \nSelect and explain. \nA. Mitochondrial DNA, B. Nuclear DNA, C. Non-coding DNA, D. DNA dependent ribonucleosomes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Mitochondrial DNAMitochondrial DNA is the only non-chromosomal DNA in human cells. Mitochondrial DNA is always maternally inherited.Thus diseases caused by mutation in mitochondrial DNA are always inherited from mother to next generation.All children from affected mother will inherit the disease but it will not be tranmtitted from an affected father to his children', 'role': 'assistant'}]