Which of the following IP addresses is a valid host address in the subnet $172\mathrm{.}16\mathrm{.}5\mathrm{.}32/28?$

Select one:

a$.172\mathrm{.}16\mathrm{.}5\mathrm{.}33$

b$.$

$172\mathrm{.}16\mathrm{.}5\mathrm{.}47$

c$.172\mathrm{.}16\mathrm{.}5\mathrm{.}32$

d$.172\mathrm{.}16\mathrm{.}5\mathrm{.}31$