In compliance with the FHS, in which of the directories are man pages found?

According to the Filesystem Hierarchy Standard (FHS), the `/usr/share/man` directory is the designated location for manual pages, which contain documentation for commands, system calls, and other system components.

The `/opt` directory is typically used for the installation of optional application software packages, not for standard system documentation like man pages.

While `/usr/doc/` might contain some documentation, the FHS specifies `/usr/share/doc` for miscellaneous documentation and `/usr/share/man` specifically for man pages.

`/var/pkg/man` is not a standard FHS directory; `/var` is for variable data like logs, and `pkg` is not a standard subdirectory for man pages.

`/var/man` is not the standard FHS location for man pages; `/var` is reserved for variable data that changes during system operation, whereas man pages are static documentation.