The below given are the steps (not necessarily in the right sequence) to run the continuous integration & continuous delivery (CI/CD) pipeline (in a random sequence). 
a. Choose Azure Repos Git as the location for source code.
b. Go to the Pipelines page. Then to create a new pipeline, select the action.
c. While setting up your pipeline, choose the Existing Azure Pipelines YAML file.
d. Choose your repository from the list of your repositories.
e. Run the pipeline. 
Choose the correct sequence of steps.

Answer options:

A.a-b-c-d-e
B.b-a-d-c-e
C.a-b-d-c-e
D.a-b-c-e-d
E.b-a-c-d-e

Correct Answer: B 
The below steps are required to be followed to run the CI/CD pipeline: 

Option A is incorrect. As can be checked from the explanation, the option doesn’t give the right sequence.
Option B is correct. The given sequence is right to run CI/CD pipeline.
Option C is incorrect. The given sequence is not correct.
Option D is incorrect. The given sequence is not the right sequence to run CI/CD pipeline.
Option E is incorrect. The given sequence is not correct.
Reference: 
To know more about building a data pipeline, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/devops/pipelines/apps/cd/azure/build-data-pipeline?view=azure-devops