Answer:
A) I
Step-by-step explanation:
In the Nested Venn Diagram, section I has organisms which have cytoplasm, DNA, ribosomes and cell membrane. These components are part of every living organism hence any organism can fall under section I. But as we move to the next level which is section II, it also includes nucleus and other cell organelles like endoplasmic reticulum and mitochondria. Prokaryotic cells do not have a nucleus and do not have well defined membrane bound cell organelles so they can not be a part of section II organisms. As we move ahead to section III and IV, there is addition of even more new components to cell hence prokaryotes do not belong to any one of them. They are the most primitive living organisms with only cytoplasm, free floating genetic material, cell membrane and ribosomes so they can only belong to section I.