Whizlabs is planning to use the GitHub Actions script for the Blue-green deployment of their application. They defined a development slot as a green slot. 
GitHub Actions Script contains several steps. Here is the beginning of the YAML file. 

 
And these are the publishing and deployment steps 

What expression will you use for SLOT 1? 
 

Answer options:

A."slot-name: dev"
B.“green-slot: development"
C."slot-name: ${{env.SLOT_NAME}}"
D."blue-slot: ${{env.SLOT_NAME}}"
E."green-name: ${{env.SLOT_NAME}}"

Answer – C 
For the <> you need to provide a slot name that is already stored in env variable in this script: 

using the following expression: 

All other Options are incorrect. 

https://docs.microsoft.com/en-us/azure/app-service/deploy-github-actions