The correct answer is option B, that is, bacteria.
Bacteria are unicellular species, like eukaryotes they also comprise ribosomes, in which proteins are put together. Bacteria lack many compositions, which are found in a eukaryotic cell like they do not possess a nucleus, they also lack membrane-bound organelles like chloroplasts or mitochondria.
The DNA in a bacteria is found in one circular chromosome, situated in the cytoplasm, and apart from that bacteria have two supplementary unique characteristics, that is, a cell wall and flagella.