Which of the following mechanisms is most likely to be involved in multiple drug resistance transfer from one cell to another?

  •  Conjugation with a cell with a free plasmid carrying drug resistance
  •   Transposition
  •  Conjugation with a cell with chromosomal drug resistance appears in the genome of a bacteriophage that has infected it.
  •   Transformation of chromosomal genes
  •   Specialized transduction of a chromosomal gene for drug resistance