You are planning to set up a VPC with Subnets. The EC2 Instances hosted in the VPC need to get the time from a custom NTP server. How can you accomplish this?

Answer options:

A.Create a DHCP Options set and provide the NTP server name.
B.Define a resource record in Route 53 and provide the NTP server name.
C.Assign the NTP server in the Subnet configuration.
D.Use an Application Load Balancer and then provide the NTP server as part of the ALB configuration.

Answer – A
You can create new DHCP options set and then provide the NTP server name as part of the options set. Below is from the AWS Documentation which shows the configuration possible in the DHCP options set.
All other options are invalid as the configurations mentioned are invalid.
For more information on the DHCP Options Set, please refer to the below URL
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_DHCP_Options.html