A team is planning to use Azure DevOps for managing the build and release pipelines for their applications. The key requirements for change requests and approvals in the build process are given below. There is a set of users that must manually validate a change request and approve the deployment onto a stage.
It needs to be ensured that no active issues are present in a work item before deployment of a build onto a stage.
It needs to be ensured that no active incidents are present for the system after it has been deployed and before promoting the release.
During the deployment pipeline, you have to prompt the user to enter the value for a parameter that will be used on certain deployment tasks. 
Which of the following is the feature to use for the requirement? 
“It needs to be ensured that no active issues are present in a work item before deployment of a build onto a stage.”

Answer options:

A.Pre-deployment approvals
B.Post-deployment approvals
C.Pre-deployment gates
D.Post-deployment gates
E.Manual Intervention

Answer – C 
Here we have to use Pre-deployment gates. 
This is also given in the Microsoft documentation. 

Since this is clearly given in the Microsoft documentation, all other options are incorrect. 
For more information on Azure Pipelines release gates and approvals, please visit the following URL- 

https://docs.microsoft.com/en-us/azure/devops/pipelines/release/approvals/?view=azure-devops