Taniya, there is no upper age limit for NEET and so if you fulfil the minimum aggregate of 50% in Physics, Chemistry and Biology in your 12th, you are eligible for NEET. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. So even if you were born in 2001, you are eligible for NEET 2021. To have a fair idea of NEET and its pattern, please check the information bulletin at: https://ntaneet.nic.in/ntaneet/ShowPdf.aspx