Hello,

Yes, you can appear for NDA 1 2021, NDA 2, 2021 and NDA 1 2022.So you have only three attempts left if you are not appearing in NDA 2 2020.The age criteria for NDA 2021 will be that a candidate must not born earlier than January 2, 2020 and not later that than January 1, 2005, for NDA 2020 the age criteria will be that a candidate must not born earlier than January 2, 2003 and not later than January 1, 2006.