Which of the below-listed services is a region-based AWS service?

Answer options:

A.AWS IAM
B.Amazon EFS
C.Amazon Route 53
D.Amazon CloudFront

Answer: B
Option A is INCORRECT. AWS IAM is a global service.
Option B is CORRECT. EFS is a regional service.
Option C is INCORRECT. Route 53 is a global service.
Option D is INCORRECT. Amazon Cloudfront is a global service.
References:
https://aws.amazon.com/efs/
https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/