How to remove KDE Plasma-Desktop?

I recently switched to ubuntu 14.04 and installed KDE plasma-desktop environment using this command :

sudo apt-get update
sudo apt-get install plasma-desktop

...And now , after using it for few minutes ,i want to delete it.I have tried to remove it through this command:

sudo apt-get remove plasma-desktop

but it still appears in the login options.....``

Solution 1:

this worked for me

sudo apt-get remove plasma-desktop kubuntu-desktop
sudo apt-get autoremove
sudo apt-get remove dolphin