Your network contains an Active Directory forest named contoso.com. All domain controllers currently run
Windows Server 2008 R2.
You plan to install a new domain controller named DC4 that runs Windows Server 2012. The new domain
controller will have the following configurations:
Schema master
Global catalog server
DNS Server server role
Active Directory Certificate Services server role
You need to identify which configurations cannot befulfilled by using the Active Directory Domain Services
Configuration Wizard.
Which two configurations should you identify? (Eachcorrect answer presents part of the solution. Choose two.)

A.
Enable the global catalog server.

B.
Install the Active Directory Certificate Servicesrole.

C.
Install the DNS Server role.

D.
Transfer the schema master.

Explanation:
AD Installation Wizard will automatically install DNS and allows for the option to set it as a global catalogserver.
ADCS and Schema must be done separately.

http://technet.microsoft.com/en-us/library/hh831457.aspx