H1B Extension Impact while Transfer gets Rejected

My Case
Currently i am working with company A and my I-94 expiry is within 1 month from today (01/14/2020) and started my extension process with company A . While my extension is in process with Company A , i received offer letter from company B and started my H1B Transfer process with company B
My Question

  1. What happens to My extension with Company A in case H1B transfer with Company B gets rejected after my I94 expiry?
  2. What happens to My extension with Company A in case H1B transfer with Company B gets rejected before my I94 expiry?
  3. If My Transfer is Approved with company B and extension with company A gets rejects , is there any impact on approved H1B with company B?
  4. Is it advisable to start H1B Transfer while an extension in progress?

Your extension process is not affected by decision on your transfer application.

Transfer is also not affected by what happens to your extension application.
Both are independent as you have filed transfer before your i94 expiry.

There is no harm in filing transfer while your extension is in process.