In a $32-$bit computer, with the virtual address $\backslash (\backslash$mathrm$\{$v$\}(\backslash$mathrm$\{$p$\},\backslash$mathrm$\{$d$\})\backslash ),$ if page size is $1$ K bytes, what is the page number $($p$)$ in terms of number of bits? Select one answer.

$22$

$21$

$23$

$18$