Given a network using a subnet mask of $255\mathrm{.}255\mathrm{.}255\mathrm{.}192,$ which of the following IP addresses is on a different subnet than the others?

Group of answer choices

$192\mathrm{.}168\mathrm{.}55\mathrm{.}80$

$192\mathrm{.}168\mathrm{.}55\mathrm{.}20$

$192\mathrm{.}168\mathrm{.}55\mathrm{.}60$

$192\mathrm{.}168\mathrm{.}55\mathrm{.}40$