Options after H1B transfer denial

[Saikrishna2018]

Hi, I’m currently in US and having H1B I-94 valid till Feb 2019 from employer A.

I got another offer from employer B and they filed my H1B transfer in PP.
Meanwhile I joined employer B and they got RFE for visa transfer.
Employer B replied to RFE and waiting for decision.

In case I get denial decision, what are my options:

1. do I need to leave US immediately?

2. Or I stop working for Employer B after denial and they refile my transfer petition. Also, I don’t have to leave US immediately as my I-94 from employer A is valid till Feb 2019. Once employer B gets receipt notice for refiled petition, I can resume working for them.