The answer key will be released by various coaching institutes as soon as the exam is concluded. The official answer key will be made available by the CBSE tentatively from the third week of June 2018. All of the correct answers to the questions asked in the exam will be present in the answer key. Using the answer key, the candidates will be able to calculate the scores they are likely to get in NEET 2018. The OMR Answer Sheets will also be displayed tentatively in the second week of June 2018. 

Hope this helps !

Official NEET Answer Key will be uploaded on Last week of May 2018 by CBSE.

You can check here - <a href="https://www.motachashma.com/entranceexam/200835/neet-answer-key.php" target="_blank" rel="nofollow">NEET Answer Key</a> 2018.