Working on EAD and green card denied. Can I go back on H1, that I still have 3 years

I applied for I-485 in Aug 2013 with company A. And I also received EAD in Oct. 2014, but continued to work for A on H1b only. On Apr 1st, A got sold to company B. So I have two options:

1) Start working for company B on EAD or
2) Get H1 transfer applied by company B and then work

IS FOLLOWING STATEMENT TRUE?

If I use option 1 (using EAD) and if my green card gets denied, then I cannot restart working on remaining H1 years in US only. And I will have to return my country immediately. While in option 2, I can remain in US and re-apply for green card, while continue working for company B.