Rohith your optical response sheet of JEE Advanced exam is estimated to be get uploaded from 22nd May 2018 - 25th May 2018. They will either mail you this response sheet on your registered mail id or will provide you with a link to log in and download on the official website i.e. https://www.jeeadv.ac.in/

You can keep checking your mail and the official website. You will be soon setting your optical response sheet and then the official answer key will be declared on 29th May 2018. You can go through it and estimate your exact marks which you will be getting in JEE Advance 2018 examination.

Feel free to ask if you have any more queries. All the best!!