Hello,
You can get the question papers and answer keys of the questions from the link below
https://news.careers360.com/rrb-ntpc-2020-21-unofficial-question-paper-and-answer-key-released
Also, RRB releases the question papers at the official site after the exam is completed. You can check the official site for more details. Also you can download the previous years question papers from the link below
https://competition.careers360.com/articles/rrb-ntpc-question-papers
Good luck!
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