Hello Likhith Sai,

You can get JEE Mains 2018 answer key from the various coaching center(like Resonance, FIITJee, Allen etc.). You can match your response from their key. You might have got a mail regarding the copy of your response, you can match from that. And very soon official key will be released.

Hey.

The results of JEE Main 2018 are not out yet. Therefore you cant get to know about your performance and your answer key as of now. 

But the unofficial answer key has been released by various coaching institutes. You can have a look at it by visiting the below link

For offline paper- https://engineering.careers360.com/articles/jee-main-official-answer-key

For online paper- https://engineering.careers360.com/articles/jee-main-answer-key

Hope this helps. Please feel free to respond and ask further questions.

All the best.