Your network contains a server named Server1. Server1 runs Windows Server 2008 R2 and
has the Active Directory Lightweight Directory Services (AD LDS) role installed. Server1
hosts two AD LDS instances named Instance1 and Instance2.
You need to remove Instance2 from Server1 without affecting Instance1.
Which tool should you use?

A.
NTDSUtil

B.
Dsdbutil

C.
Programs and Features in the Control Panel

D.
Server Manager

Explanation:
Reference 1)
http://technet.microsoft.com/en-us/library/cc794857.aspx
Administering AD LDS Instances
Each AD LDS instance runs as an independent—and separately administered—service on a
computer.
Reference 2)
technet.microsoft.com/en-us/library/cc794886.aspx
To remove an AD LDS instance
1. To open Programs and Features, click Start, click Settings, click Control Panel, and then
double-click
Programs and Features.
2. Locate and click the AD LDS instance that you want to remove.
3. Click Uninstall.
Note
It is not necessary to restart the computer after you remove an AD LDS instance.