/usr/share/man/man3/ares_init_options.3.gz is in libc-ares-dev 1.10.0-3ubuntu0.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/ares_init.3.gz
/usr/share/man/man3/ares_init.3.gz