If you must cross into the oncoming lane as you make a turn, you should:. A) Complete your turn without stopping.
B) Back up to allow oncoming traffic to pass.
C) Watch for oncoming traffic.

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.