Is option 3 is given for plasmid because the genetic material of bacteria is double standard linear DNA

Solution:
Please note that genetic material of bacteria is not linear dsDNA. The genetic material of bacteria consists of single circular DNA molecule, not enveloped by nuclear membrane. They lack histones. Therefore, option d is correct. 

Please note that a plasmid is also a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. So, it is extra-chromosomal and autonomously replicating.