A company is planning to set up a solution in Azure. The solution would have the following key requirement. Provide a digital online assistant that provides speech support.
Which of the following would be best suited for this requirement?

Answer options:

A.Azure Machine Learning
B.Azure IoT Hub
C.Azure Bot Service
D.Azure Functions

Answer – C 
The Microsoft documentation mentions the following. 

Since this is a clear feature of the tool, all other options are incorrect. 
For more information on Azure AI Bot, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/bot-service/bot-service-overview-introduction?view=azure-bot-service-4.0