Question: In which of the following scenarios does the "Active" state exist in a mobile network?
Option 1: When the network has awarded the call to the called mobile station and the remote user has not answered the call.
Option 2: When the network has indicated that the remote user has answered the call for a mobile originating call, or when the network has awarded the call to the called mobile station for a mobile terminating call.
Option 3: When the mobile station is in idle mode and there are no ongoing calls.
Option 4: When the network has rejected the call due to insufficient resources.
Explanation: The "Active" state exists when the network has indicated that the remote user has answered the call for a mobile originating call, or when the network has awarded the call to the called mobile station for a mobile terminating call. This is because in both scenarios, the call has been successfully established and is now active.