how can i resolve unmet dependencies in 16.04

Question

I cannot install packages in my 16.04 ubuntu server. Getting below error while doing the same:

root@ubuntu:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 network-manager-gnome : Depends: libappindicator3-1 (>= 0.4.90) but it is not installed
                         Depends: libnma0 (= 1.2.6-0ubuntu0.16.04.4) but it is not installed
                         Depends: libsecret-1-0 (>= 0.7) but it is not installed
                         Depends: policykit-1-gnome
                         Depends: dbus-x11
                         Recommends: gnome-keyring
                         Recommends: mobile-broadband-provider-info but it is not installed
E: Unmet dependencies. Try using -f.
root@ubuntu:~#

Same error is being displayed after trying to "apt-get" every package.

Help needed