You are developing an Azure messaging solution. You need to ensure that the solution meets the following requirements: ✑ Provide transactional support. ✑ Provide duplicate detection. ✑ Store the messages for an unlimited period of time. Which two technologies will meet the requirements? Each correct answer presents a complete solution. NOTE: Each correct selection is worth one point. 

Answer options:

A. Azure Service Bus Topic
B. Azure Service Bus Queue
C. Azure Storage Queue
D. Azure Event Hub

AB

The Azure Service Bus Queue and Topic has duplicate detection. Enabling duplicate detection helps keep track of the application-controlled MessageId of all messages sent into a queue or topic during a specified time window. Incorrect Answers: C: There is just no mechanism that can query a Storage queue and find out if a message with the same contents is already there or was there before. D: Azure Event Hub does not have duplicate detection Reference: https://docs.microsoft.com/en-us/azure/service-bus-messaging/duplicate-detection