Where did immigrants first set foot in the new world to gain entry?

The first place for millions of immigrants to set foot on the American soil was the Ellis Island in New York in the Upper New York Bay as was an immigrant inspection station until 1954.

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.