What is needed by police to enter a private residence in order to collect evidence?
a. subpoena
c. a feeling that something is there
b. search warrant
d. writ of rite

The correct answer is b. search warrant

Without a search warrant the police cannot enter a private residence unless you allow them to.

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.