NEST

If you have entered PWD category during form fillup and also if they didn't ask about uploading the certificate, then yes you can show it there during counselling.

NEST Answer Key 2019: National Institute of Science Education and Research, Bhuvaneshwar (NISER) will conduct the National Entrance Screening Test NEST on June 01, 2019. The official NEST answer key will be released after the exam. Moreover, you can predict your marks before the NEST Result is announced.

Refer this link for the eligibility criteria of NEST https://www.shiksha.com/college/national-institute-of-science-education-and-research/nest-exam.

If you have already submitted the form, then changes won't be possible now. You can drop a mail or call the concerned authorities regarding the same.

There is no negative marking. However, in the subject sections, for certain questions there will be negative marking for incorrect answers. Some questions may have one or more correct answers for which marks can only be earned by marking all correct answers and no wrong answer. Visit this link for more information. https://www.shiksha.com/college/national-institute-of-science-education-and-research/nest-exam-pattern.