Hello,
Usually the official answer key is uploaded around 7-10 days of the exam.
The marks difference between the official answerkey and the coaching answer key is around plusminus 10.

You can find all truted coaching center answer keys at the link given below they'll be downloaded as you click the click here option next to the coaching institute name:- https://medicine.careers360.com/articles/neet-answer-key

However Answerkeys for all sets will be uploaded soon.

You can use our careers360 college predictor to predict the college at your rank:-