Answer:
Archaean.
Step-by-step explanation:
DNA is present as genetic material in all the living organism except some viruses. DNA consists of nitrogenous bases, pentose sugar and a phosphate group.
The archean includes the unicellular organism and lacks the membrane bound organelle. Their DNA is not encased within the nuclear envelope and the nucleus is not covered with the nuclear envelope. Eukaryotes have been evolved from the primitive organisms.
Thus, the correct answer is option (3).