You enabled distributed tracing for an application using the native capabilities of Application Insights. One of the components, say component A, receives a request from the browser and calls another component, say component B, using HTTP. 
You analyzed the resulting telemetry in Application insights, which displayed three telemetries. A request telemetry from component A with ID ‘ARID’, parent id ‘PARID’ and root operation id ‘OAID’; A dependency telemetry from component A with ID ‘ADID’ and a request telemetry from component B with ID ‘BRID.’ 
What should be the Parent id of the only dependency telemetry?

Answer options:

A.PARID
B.ARID
C.OAID
D.BRID

Answer: B 

https://docs.microsoft.com/en-us/azure/azure-monitor/app/distributed-tracing
https://docs.microsoft.com/en-us/azure/azure-monitor/app/correlation
https://docs.microsoft.com/en-us/azure/azure-monitor/app/correlation