Hello Anirudh,

CBSE will release answer keys &images of response sheets (OMR sheets) of Pen & Paper Based examination and answer keys of Computer based examination will be on the official website www.jeemain.nic.in during 24th - 27th April, 2018.

Good Luck.

Hello sir!
Thank you for asking the question!

The official answer key for the JEE mains paper 2 will be released between 24 - 27 April, 2018 on the official website of JEE mains.
Please open the given link to see the unofficial answer key.
https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-paper-2-answer-key%3famp
All the best!