You have an Azure DNS zone named adatum.com. You need to delegate a subdomain named research.adatum.com to a different DNS server in Azure. What should you do? 

Answer options:

A. Create an NS record named research in the adatum.com zone.
B. Create a PTR record named research in the adatum.com zone.
C. Modify the SOA record of adatum.com.
D. Create an A record named *.research in the adatum.com zone.

A

You need to create a name server (NS) record for the zone. Reference: https://docs.microsoft.com/en-us/azure/dns/delegate-subdomain