Your network contains an Active Directory domain named contoso.com. The domain has
Remote Desktop Services (RDS) deployed. The domain contains a server named Server1.
Server1 has the Remote Desktop Licensing role service installed. You need to back up the
Remote Desktop Licensing (RD Licensing) database. Which folder should you include in the
backup? To answer, select the appropriate folder in the answer area.
Answer: 
lserver is correct
right answer, see the following link
https://support.microsoft.com/en-us/kb/201371
lserver is a better answer.