When you look far ahead as you drive, you are
a. looking down at the area just in front of your vehicle.
b. learning about farsightedness.
c. aiming high in steering.
d. watching for users to your sides.

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.