Bacteria lack alternation of generation because there is

Correct Option (a) Reason : Bacteria reproduces asexually by transverse binary fission, conidia, budding, cyst and sporulation. No true sexual reproduction (involving formation of gametes, their fusion and meiosis) is known to occur in bacteria.

However, in bacteria the transfer of genetic material from donor to recipient cell to bring genetic recombinations/variations is 'reported that occurs not through gametes/sex cells, but by other methods like conjugation, transduction and transformation. It does not result in any multiplication of cells.