The correct option is A Mitochondria
A eukaryotic cell has DNA in nucleus as well as cell organelles like mitochondria and chloroplasts. The DNA in cell organelles resembles prokaryotic DNA. These organelles (mitochondria and chloroplasts) not only have DNA but also their own protein synthesis machinery. These organelles are double membrane bound and can divide through fission independent of nuclear division. Thus these cell organelles are semi-autonomous.