How should you configure the username?

DRAG DROP
You have an Azure subscription that contains an Azure IoT hub and 100 IoT devices.
The devices connect to the IoT hub by using the Advanced Message Queuing Protocol (AMQP) protocol and authenticate to the IoT hub by using symmetric keys.
You need to configure the SASL PLAIN username for the AMQP connection.
How should you configure the username? To answer, drag the appropriate options to the correct targets. Each option may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:

Correct Answer:

Explanation/Reference:
Explanation:
Box 1: DeviceID
If you use AMQP claims-based-security, the standard specifies how to transmit these tokens.
For SASL PLAIN, the username can be:
{policyName}@sas.root.{iothubName} if using IoT hub-level tokens.
{deviceId}@sas.{iothubname} if using device-scoped tokens.
Box 2: sas
Box 3:IoT hub hame
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-dev-guide-sas