What is the typical address of the loopback interface on a Linux localhost?

Question $14$ options:

$127\mathrm{.}0\mathrm{.}0\mathrm{.}53$

$127\mathrm{.}0\mathrm{.}0\mathrm{.}1$

$192\mathrm{.}168\mathrm{.}0\mathrm{.}1$

$0\mathrm{.}0\mathrm{.}0\mathrm{.}0$