Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle. Prokaryotes include two groups: bacteria and another group called archaea. Having organelles is a big deal for a cell.
Prokaryotic cells have no nucleus and they are small and simple.
while, eukaryotic cells have a nucleus and are large and complex as
opposed to prokaryotic.
so the answer is "B", "Lactobacillus"