The diagram below shows the structural formula and 3D model of the same substance. Which substance is represented by the diagram above?

Four structural models are shown.The first model has a capital H at the upper left. A small black wedge that opens toward the H connects at its tip to a capital O at the lower right. This capital O is connected to a second capital O to the right by a dash a wedge comprised of horizontal dashes connects the capital O at its tip to a second capital H to the upper right. A second model looks much like a tubular letter Z with white tips and a red center. The third model has a small white ball connected with a small rod to a red sphere at the upper right. This sphere connects to a second red sphere down and to the right with a rod. A final white sphere is connected up and to the right by a rod. The final model shows two white spheres on the left and right overlapping two red spheres at the center.
A. H2O
B. OH
C. H2O2
D. OH2

You don't describe the model "above" so I have no way of comparing. If I read the description correction the description at the bottom for the first modelis HOOH which is H2O2; i.e., hydrogen peroxide