Hey! The answer key of the Joint Entrance Main (JEEMain) examinations is likely to be released onWednesday, January 16, 2019. It will take four to fivedays to release the answer key, the NTA is expected torelease the answer key of the JEE Main examinationson Wednesday, January 16, 2019." The result of theJEE Main examinations will be released on January31, mentioned the official. This is confirmed by" theIndian express". Hope this helps you,

Hey Sukendhar

The official answer key for jee mains has not yet been declared but many institutes and sites have published rough idea of question paper and answer key based on the students who attempt the exam .

So you may get rough idea about your score .And for official key keep checking the mains site it will be published within 10-12 days andyou can see your omr sheet online and you can put query against any answer witha valid solution.and your result will pe published on 31st of january with  correction in key if possible.

So good luck

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

You can download the answer key for JEE MAINS 2019 january paper from the link provided above.

hope this helps