I'm sure it is in fact a G bear on the left and they took photographs of a known G bear with a black/nearly black coat and in a posture that hides other features and intentionally put it side by side with a black bear to prove a point about size/color not being enough info to differentiate bear species. It would have been helpful if there were additional photos of that same bear that clearly show other G bear features.
In the actual test there was a photo of a distant black bear and the question was whether or not there was enough information to positively identify the species of bear. They clearly want you to answer no, however, I saw it clearly as a black bear and couldn't bring myself to answer no just because they wanted me to, so I answered yes. It was the only question I got "wrong".