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 in every 5 minutes. In order to configure the necessary security agents, you decide adding the following script to your device’s azureiotsecurity twin, as desired properties: 
<pre class="brush:java;">"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: A
Option A is CORRECT because in order 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 its twin’s ‘desired’ parameters section.
Option B is incorrect because custom properties must be set inside the agent configuration object, under the azureiotsecurity module twin, i.e. 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 module level.
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