Which of the below mentioned AWS services can help achieve this functionality?

A user is planning to host a mobile game on EC2 which sends notifications to active users on either high score or the addition of new features. The user should get this notification when he is online on his mobile device.

Which of the below mentioned AWS services can help achieve this functionality?
A . AWS Simple Notification Service.
B . AWS Simple Email Service.
C . AWS Mobile Communication Service.
D . AWS Simple Queue Service.

Answer: A

Explanation:

Amazon Simple Notification Service (Amazon SNS) is a fast, flexible, and fully managed push messaging service. Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed services.

Reference: http://aws.amazon.com/sns