$14-$ Router A has a summarised route to $172\mathrm{.}16\mathrm{.}0\mathrm{.}0/14.$ It sends a RIP v$2$ update including this route to Router B$,$ which is also running RIP v$2.$ What happens?

a$)$ Router B installs the summarised route to $172\mathrm{.}16\mathrm{.}0\mathrm{.}0/14$ in its routing table $($assuming that it has no better route.$)$

b$)$ Router B performs automatic summarisation to the class boundary and installs a route to $172\mathrm{.}16\mathrm{.}0\mathrm{.}0/16.$

c$)$ Router B performs automatic summarisation to the class boundary and installs routes to $172\mathrm{.}16\mathrm{.}0\mathrm{.}0/16,172\mathrm{.}16\mathrm{.}1\mathrm{.}0/16,172\mathrm{.}16\mathrm{.}2\mathrm{.}0/16$ and $172\mathrm{.}16\mathrm{.}3\mathrm{.}0/16.$

d$)$ Router B does not install any route to $172\mathrm{.}16\mathrm{.}0\mathrm{.}0$ in its routing table.