An example of multiple allelism in humans isa)albinism. b)cystic fibrosis. c)abo blood groups. d)sickle cell disease.

ABO blood groups is the example

C) ABO blood groups

Explanation:

The multiple allelism is the conception of the multiple genes in one person in the alternative forms and that a occupy the same locus and is ABO system is maintained by the three alleles is a group of the three gene cells.

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.