You need to ensure that VM1 can communicate with VM4. The solution must minimize the administrative effort.
What should you do?
C
Explanation:
Reference:
https://docs.microsoft.com/en-us/azure/vpn-gateway/tutorial-site-to-site-portal
this is incorrect. if you will assign that IP to VM4 you need to redeploy the VM itself and connect it to Vnet 1 .