What triggered the mobilization of military in austria-hungary?
a. the annexation of the balkans.
b. the assassination of franz ferdinand.
o c. growing tensions between the triple entente and the triple alliance.
d. the 1815 treaty at the congress of vienna.

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.