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To ensure redundancy in the event of an Azure region failure while also having access to the full .NET framework for a web application, deploying virtual machines along with Traffic Manager is a suitable solution. This approach allows for the installation and configuration of a web application on multiple virtual machines across different Azure regions.

Traffic Manager plays a critical role here by routing traffic to the available instances of the web app based on configured rules, health checks, and geographic locations. This ensures that if one region goes down, Traffic Manager can redirect the traffic to a healthy instance in another region, thus maintaining service availability.

In contrast, other options may not adequately meet the requirement for full .NET framework capabilities or regional redundancy in the same way. Azure App Service provides a platform for applications but may not give the same level of control or compatibility with all features of the full .NET framework as hosting on virtual machines. Azure Functions are better suited for serverless computing scenarios and might not support full .NET framework applications in the same capacity. Azure Logic Apps focus on automating workflows and integrations rather than hosting full-fledged web applications, which is not aligned with the requirement for redundancy and framework access.

Overall, deploying virtual machines with Traffic Manager offers comprehensive redundancy and the necessary support for the