The correct answer is option (B) mitochondrion.
A Venn diagram represents an illustration of relationship between two groups, showing the characteristics of the groups separately in two circles and the similarities shown in the intersecting region of the two circles. When a Venn diagram is constructed to compare the organelles in plant and animal cells, the organelle that should be listed under "both" in the diagram is the mitochondrion. Mitochondrion is a cell organelle that is the power house of the cell storing energy in the form of Adenosine triphosphate (ATP). It is present in both the plant and animal cells. It is made up of an outer membrane and an inner membrane with the inter membrane space, the cristae with the F1 particles and the mitochondrial matrix with proteins, enzymes, tRNA and the mitochondrial genome. Whereas centriole is present only in animal cell and chloroplast, cell wall are present only in plant cell.