Hint: The id together with some prefix constitutes the chat invitation link.It's not possible to send link to almost everyone in chatbox, still i have sent to a few i found handy.

Sorry i can't provide the link directly here as per rules.But i can tell you the chat id - Le7CzfHThAAIfQvB6OAJQm

The time of exam is: 8-9 P.MYou will get an email by 1P.M with all the details.Please join the whatsapp discussion group to stay updated.

yes that is the id you have to paste in the google form 

This group only.