To answer this question, you need to understand the concept of SMS, which stands for Service Management System.
Let's go through each option to understand why it is correct or incorrect:
Option A) Switch Management System - This option is incorrect because SMS does not stand for Switch Management System. The expansion of SMS is not related to switches.
Option B) Server Management System - This option is incorrect because SMS does not stand for Server Management System. The expansion of SMS is not related to servers.
Option C) Synch Management System - This option is incorrect because SMS does not stand for Synch Management System. The expansion of SMS is not related to synchronization.
Option D) Service Management System - This option is correct because SMS stands for Service Management System. It is a system that manages various services provided by an organization.
The correct answer is D) Service Management System. This option is correct because SMS is commonly used to refer to Service Management System.