A team is developing an application that would be deployed using ARM templates. The templates would also be used to create virtual machines. You need to store a secret for the virtual machine in an Azure Key Vault. 
You need to complete the following script for this purpose. 

<span style="font-size:calc(var(--rem) * 1px * 1.0625); letter-spacing:0px">Which of the following would go into Slot3?

Answer options:

A.keyvault
B.vault
C.secret
D.set

Answer - C 
An example of this is given in the Microsoft documentation. 

Since this is clearly mentioned in the Microsoft documentation, all other options are incorrect. 
For more information on creating a key vault via the CLI, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/key-vault/quick-create-cli