You need to build enhanced security around your IoT infrastructure. You want to use Azure Security Center’s Defender for IoT where you need to set up a security agent to report on your device’s connection events with high priority and collect high priority events every 5 minutes. To configure the necessary security agents, you decide to add the following script to your device twin’s desired properties: 
<pre>"ms_iotn:urn_azureiot_Security_SecurityAgentConfiguration": {
"highPriorityMessageFrequency": {
"value": "PT5M"
},
"eventPriorityConnectionCreate": {
"value": "High"
}
}
</pre>
Is this the right solution to achieve your goal?

Answer options:

A.Yes
B.No

Correct Answer: B
Option A is incorrect because it is the module twin of the azureiotsecurity module identity of the device which holds the configuration objects of the security agents, i.e. security agents must be configured at the module level.
Option B is CORRECT because, to set up the security agents, an azureiotsecurity module identity has to be created under your device, and the configuration code above must be added to the module twin’s ‘desired’ parameters.
References: 

https://docs.microsoft.com/en-us/azure/defender-for-iot/quickstart-create-security-twin
https://docs.microsoft.com/en-us/azure/defender-for-iot/how-to-agent-configuration