Many people confuse main memory and secondary storage. Explain why they get confused, and describe howyou would explain the differences to classmates so they would no longer confuse the two. [Based on M

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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.