b. The genetic material is surrounded by its own phospholipid bilayer, distinct from the phospholipid bilayer that surrounds the cell.
Explanation:
In eukaryotes genetic material is DNA and it is located in the well defined nucleus. The nucleus in eukaryotes is definite nucleus which is surrounded by by a unit membrane called nuclear membrane which is made of phospholipid bilayer. Whereas, in prokaryotes incipient nucleus is present which is not surrounded by nuclear membrane. Thus, option b. is correct.
