Which of the following is a Web service that can publish messages from an application and deliver them to other applications or to subscribers?

A) Amazon Simple Notification Service

B) Amazon Simple Queue Service

C) Amazon Elastic Compute Cloud

D) Amazon Simple Storage System

Correct Answer : Amazon Simple Notification Service

Explanation : Amazon Simple Notification Service(SNS) provides a method for triggering actions, allowing clients or applications to subscribe to information (like RSS), or polling for new or changed information or perform updates.