Respuesta :
Answer:
The correct answer will be option-D.
Explanation:
The DNA used in genetic engineering is the extra-chromosomal genetic element called plasmid.
Plasmids are the circular structure present in the cytoplasm of the bacteria which gets transferred to the other bacteria through conjugation. Plasmids are used in genetic engineering especially in the biotechnology to generate the recombinant DNA. They are still crucial tools in the laboratories.
Thus, option-D is the correct answer.