  Marks showed that $\mathbb{F}_2Q_8$, the $\mathbb{F}_2$ group algebra over
the quaternion group, is a reversible nonsymmetric ring, then questioned
whether or not this ring is minimal with respect to cardinality. In this work,
it is shown that the cardinality of a minimal reversible nonsymmetric ring is
indeed 256. Furthermore, it is shown that although $\mathbb{F}_2Q_8$ is a duo
ring, there are also examples of minimal reversible nonsymmetric rings which
are nonduo.
