It occupies position near center of cell:

Explanation

The correct answer is the nucleoid. In prokaryotic cells, the nucleoid is the region where the cell's chromosomal DNA is concentrated. It is centrally located within the cell and is not enclosed by a membrane, unlike a nucleus in eukaryotic cells. This makes it unique to prokaryotes.Option A, Chromosome, refers to the DNA structure found within the nucleoid, not a separate entity. Option B, Plasmid, is a smaller DNA molecule that exists separately in the cytoplasm and is not centrally located. Option D, Mitochondria, are organelles found only in eukaryotic cells and thus not present in prokaryotes.