Your company has an Azure DevOps project. They want to create release pipelines in the DevOps project. The release pipelines need to access secrets stored in an existing Key Vault service. 
Which of the following would you create to ensure that the release pipeline could access the secret in the key vault?

Answer options:

A.Access keys
B.Service principal
C.Password
D.Certificates

Answer – B 
To access the secret in the Key Vault, you have to create a service principal. 
This is also mentioned in the Azure DevOps Lab documentation. 

Since this is clearly mentioned, all other options are incorrect. 
For more information on using the Key Vault from your pipeline, please visit the following URL- 

https://azuredevopslabs.com/labs/vstsextend/azurekeyvault/