Hi Manohar.....

Kindly check the below link to get the answer key for JEE Mains 2019 January 11th exam.

https://nextincareer.com/jee-main-11th-january-2019-answer-key/

Hope this helps.....Thank U

Hello,Aspairant

You can visit  the below link for jee answer key of all the dates

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-answer-key/amp

It was not official it was published by 

Career 360. 

Official yet to be published  by conducting organisation (NTA).

Hope this will help you.

All the best

For queries feel free to ask