Hi aspirant

You can download official answer key either from official website or from here: https://engineering.careers360.com/articles/jee-main-answer-key

Visit the official website here: https://jeemain.nic.in/webinfo/Public/Home.aspx

You can view all updated news on the official website.

Whatever changes are made will be reflected here also.

If you have any doubts you can challenge also .Check the process of challenging by visiting the link given above.

Hope this was helpful.