You are deploying a software as a service (SaaS) application that requires a relational database for Online Transaction Processing (OLTP). Which Azure service should you use to support the application? 

Answer options:

A. Azure Cosmos DB
B. Azure HDInsight
C. Azure SQL Database
D. Azure Synapse Analytics

C

Azure SQL Database is relational database and a managed service. Incorrect Answers: A, B: Cosmos DB, HDInsight are non-relational databases. D: Azure Synapse Analytics is for data warehousing, not for Online Transaction Processing Reference: https://cloud.netapp.com/blog/azure-cvo-blg-azure-database-review-your-guide-for-database-assessment