Answer: Azure Arc

Azure Arc is the correct solution because it enables extending Azure management and governance capabilities to on-premises and multi-cloud environments. It allows connecting Windows Server machines to Azure and managing them centrally through the Azure portal alongside other Azure resources. The community discussion shows 100% consensus for option B with multiple comments explaining that Azure Arc specifically addresses this scenario of managing on-premises servers through Azure portal. Option A (AKS) is for container orchestration, option C (Docker) is for containerization technology, and option D (RBAC) is for access control - none of these provide the capability to manage on-premises Windows servers through Azure portal.

Author: LeetQuiz Editorial Team