Hi saurabh,
Many thanks for your response.
I got I 797 C when i applied H4 and it says application was received.
Then recently the online status has changed to “case was approved” and i received another I 797 C which says Notice Type : Approval Notice.
UPDATE: I jst got I 797 A as well. This was sent to my law firms address where as i got i 797 c to my address (not sure why ). Updating jst so the future readers would know.