Is propaganda an effective way to bring about change?

I can be, and can not be. Most of the times though; are for good. :)
       Good luck! Have a nice Day!

Most times it is extremely helpful but in some cases people have even died from it, so you decide; helpful or not?

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.