Got 221g white form for H1b from Employer A. Can I go with Employer B now?

Hi all,
I got two H1bs from different employers Employer A and Employer B.

I decided to go with Employer A and attended visa interview at New Delhi yesterday when I was told that they cannot issue my visa. They have given me 221g white sheet and was told to submit the documents at VAC. It seems that they need some extra documents from client/petitioner.

My employer A is saying that he is currently arranging the documents from the client.

Now, is it possible to schedule an interview with H1b of Employer B?

Do I need to inform Employer B about this 221g or can I directly schedule an interview using Employer B’s receipt number?

Please help.