Azure SQL Database single database supports Data Sync.
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/features-comparison Basic Concept: This question tests plan and implement data platform resources in the DP-300 exam context.
The correct choice is determined by the exact service boundary and operational requirement stated in the scenario.
Why B is Correct: Azure SQL Database single database is correct because it is the feature whose normal purpose matches the stated requirement. Azure SQL Database single database is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. The scenario wording points to that specific behavior: You need to recommend a database service for the deployment.
Why A is Wrong: Azure SQL Managed instance is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It would solve a neighboring problem, but not the deployment, sizing, or migration requirement in this item.
Why C is Wrong: Azure Database for PostgreSQL is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.
Why D is Wrong: SQL Server on Azure virtual machines is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It would solve a neighboring problem, but not the deployment, sizing, or migration requirement in this item.