Answer Happy

Which of the following statements about drug names is/are
correct?
W. A generic drug name might indicate the class
of drug
X. More than one company might sell a drug with the same
generic name
Y. A drug with one generic drug name might have only
one trade name
Z. All drugs have multiple trade names
a.
only W, X and Y are correct
b.
only W and Y are correct
c.
only X and Z are correct
d.
only Z is correct
e.
all are correct
Clear my choice