The correct option is B E. coli
E. coli is prokaryote. Prokaryotes do not have a well-defined nucleus. Their genetic material is dispersed in the cytoplasm. Prokaryotes undergo binary fission and not mitosis.
Mitosis occurs only in eukaryotes. Eukaryotes have a well-defined nucleus. All other options Saccharomyces, Chlorella and Plasmodium are eukaryotes.