NTA NCET 2023 Answer Key Challenge Window: The National Testing Agency (NTA) will close the answer key challenge window for the National Common Entrance Test (NCET) for admission to the 4 Year Integrated Teacher Education Programme (ITEP) on August 16, 2023. Candidates can raise objections against the NCET 2023 answer key on the official website, ncet.samarth.ac.in.