Below identifiers are part of each Google Cloud project and are used in certain command lines and API calls:
-Project name
-Project ID
-Project number
Which of the statements below regarding “Project number” is correct?

Answer options:

A.Customer can only provide “project number”.
B.“Project number” can be provided by either the customer or Google.
C.Google can only provide “project number”.
D.Project number and Project ID are the same identifier.

Correct Answer: C
Option A is incorrect. Project number can be provided only by Google. Hence, this option is incorrect.
Option B is incorrect. Project number can be provided only by Google. Hence, this option is incorrect.
Option C is correct. Project number can be provided only by Google.
Option D is incorrect. Project number and Project ID are different identifiers. Project ID can also be provided by either Google or by Customer.
https://cloud.google.com/docs/overview#projects