Problem with Employer

Hello,

Please help me in the below:

I am working with Company 'A'. Company 'B' has filed for my H1 transfer. I placed resignation in 'A' giving 2 weeks notice.

But 'A', being India based IT company who transferred me to US branch office, asking me to go back to India and resign with India notice period clause. They have this line in the transfer/offer letter given to me for their US branch.

I have commited on a certain date to 'B' and can not afford (in terms of duration...

Problem with Employer