Rahul Gandhi said that the agency had set faulty papers and repeated old questions, forcing thousands of candidates to appear for the examinations again in September.
The computer-based UGC-NET is held twice a year and decides admissions to PhD programmes, assistant professor jobs and junior research fellowships in colleges and universities.
In its affidavit, Centre said shifting NEET-UG from pen-and-paper to a computer-based format, either in a single or two-stage exam on the lines of JEE, is under active consideration.