Which DNS name can only be resolved within Amazon EC2?

A.
Internal DNS name

B.
External DNS name

C.
Global DNS name

D.
Private DNS name

Explanation:
Using Private Hosted Zones
If you want to access the resources in your VPC using custom DNS domain names, such as example.com,
instead of using private IP addresses or AWS-provided private DNS hostnames, you can create a private
hosted zone in Amazon Route 53. A private hosted zone is a container that holds information about how you
want to route traffic for a domain and its subdomains within one or more VPCs without exposing your resources
to the Internet. You can then create Amazon Route 53 resource record sets, which determine how Amazon
Route 53 responds to queries for your domain and subdomains. For example, if you want browser requests for
example.com to be routed to a web server in your VPC, you’ll create an A record in your private hosted zone
and specify the IP address of that web server. For more information about creating a private hosted zone, see
Working with Private Hosted Zones in the Amazon Route 53 Developer Guide.