You need to identify which service location (SRV) records are registered by DC3

Your network contains an Active Directory domain named adatum.com. The domain
contains three domain controllers. The domain controllers are configured as shown in the
following table.

DC3 loses network connectivity due to a hardware failure.
You plan to remove DC3 from the domain.
You log on to DC3.
You need to identify which service location (SRV) records are registered by DC3.
What should you do?

A.
Open the %windir%\system32\dns\backup\adatum.com.dns file.

B.
Open the %windir%\system32\config\netlogon.dns file.

C.
Run ipconfig /displaydns.

D.
Run dcdiag /test:dns.

Explanation:
A) Netlogon service creates a log file that contains all the locator resource records and
places the log file in the following location:
Incorrect answers:
B) Analyzes the state of domain controllers in a forest or enterprise and reports any
problems to help in troubleshooting.
C) This is the dns backup file.
D) This command is used to display current resolver cache content.
References:
http://technet.microsoft.com/en-us/library/cc959303.aspx
http://technet.microsoft.com/en-us/library/cc731968(v=ws.10).aspx