Extra chromosomal DNA occurs in

Mitochondria

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Ribosomes

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Nucleus

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Chromosomes

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Solution

The correct option is B Mitochondria
Extrachromosomal DNA (extranuclear DNA or cytoplasmic DNA) refers to the DNA found outside the nucleus of a cell.
Extrachromosomal DNA is present in cellular organelles such as mitochondria and chloroplast,
These organelles are descended or evolved from a bacterial cell and therefore, possess their own DNA.
So, the correct answer is 'Mitochondria'.

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