HOTSPOT
You have a server named Server1 that runs Windows Server 2012 R2.
You need to switch Server1 to a Server Core installation of Windows Server 2012 R2.
What command should you run?
To answer, select the appropriate options in the answer area.
Answer: 
Explanation:
Answer is correct.
Reference:
http://blogs.technet.com/b/yungchou/archive/2014/01/16/windows_2d00_server_2d00_2012_2d00_r2_2d00_installation_2d00_options_2d00_and_2d00_features_2d00_on_2d00_demand_2d00_part_2d00_4_2d00_of_2d00_5.aspx
Yup answer is correct – if you remove the gui-mgmt-infra then the server-gui-shell (which sits on top of the gui-mgmt-infra role) must also be removed and is automatically.