A start-up firm is using the Amazon Aurora MySQL database for its enterprise application. Due to massive growth in different regions, they are looking for setting Read Replica in different regions to increase Read performance for users in different regions. Which of the following should be considered for the Amazon Aurora MySQL cross Region replica?

Answer options:

A.Up to 5 cross-region Read-Replica are supported for only unencrypted DB cluster in any AWS region.
B.Up to 15 cross-region Read-Replica is supported for both encrypted & unencrypted DB clusters in any AWS region.
C.Amazon Aurora MySQL only supports in-region replica & not cross-region replica.
D.Amazon Aurora MySQL automatically creates a cross-region Read Replica for the Amazon Aurora MySQL DB cluster.

Correct Answer: B
To increase availability & enable users to enhance Read performance by reading data from the nearest Regions, Read Replicas can be created for the Amazon Aurora MySQL database. Up to 15 Read Replicas can be created for both encrypted & unencrypted DB clusters in different AWS regions. These cross-region Read Replicas can be created using the AWS Management Console, AWS CLI, or Amazon RDS API.
Option A is incorrect as Read Replicas can be created for both encrypted & unencrypted DB clusters in any AWS region.
Option C is incorrect as Amazon Aurora MySQL supports cross-region replica.
Option D is incorrect as you will need to manually create a cross-region Read Replica for the Amazon Aurora MySQL DB cluster.
Don`t get confused between 5 cross-region DB clusters and 15 cross-region Read-Replica
For more information refer below,
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Replication.CrossRegion.html