A medical student assisting with this research is interested in applying the results of the experiment to spinal cord injury in humans. The principal investigator responds that this study does not apply to such injury, most likely because:

Absolute

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.