The right answer is mitochondria; the only energy-generating structures found in cells.
Animal cells do not have chloroplasts, of which "A" is false.
Ribosomes are present in plant cells, as are centrioles.
Mitochondria is a eukaryotic cell organelle. It appeared to be endocytosis of a bacterium by an ancestral cell (endosymbiosis). Indeed, the mitochondrion has a DNA genome on a circular chromosome, whose genes resemble those carried by bacteria.