Ampicillin, Chloramphenicol, Tetracycline or Kanamycin resistant genes fall under the category of :
Restriction endonucleases
Restriction exonucleases
Selectable Marker
All of the above
As we have already discussed in Features required to facilitate cloning into a vector -
Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli. Hence, the correct option is (c).