In bacteria.cell there is not a well develop of nucleus.. and nucleuoplasm mixed with cytoplasm .. so dna replicate before fission..option B is correct.

Explanation:
DNA replication is the process of copying the genetic information in a cell. In bacteria, DNA replication occurs prior to fission. Bacteria divide by a process called binary fission where the cell divides into two identical daughter cells. Before the cell divides, it needs to make a copy of its DNA so that each daughter cell receives a full set of genetic information.

The process of DNA replication in bacteria:
1. The DNA molecule unwinds and separates into two strands.
2. Enzymes called helicases break the hydrogen bonds between the base pairs, separating the two strands of DNA.
3. Each strand then serves as a template for the synthesis of a new complementary strand.
4. The enzyme DNA polymerase adds new nucleotides to the growing strands, following the base-pairing rules (A with T, G with C).
5. The two new strands are then joined together, creating two identical copies of the original DNA molecule.

Importance of DNA replication:
DNA replication is important because it allows bacteria to pass their genetic information on to their daughter cells. Without DNA replication, each daughter cell would receive only half of the genetic information, leading to genetic disorders and death.

Conclusion:
In conclusion, DNA replication in bacteria occurs prior to fission. The process is essential for the bacteria to pass on their genetic information to their daughter cells and ensure the survival of the species.