During the cold, dark winter months Christian was a conscientious student who always attended class and completed his coursework on time. But on the first sunny day of spring Christian dropped his studies, forgot about classes, hopped in his car and drove 3 hr to the nearest beach demonstrating a orientation toward time.

Abortion would be the most interesting topic to me

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.