Hello, Kindly specify about what exam is your query about so that we can help you further. Seeing that you are medicine aspirant from your profile the eligibility criteria for NEET 2021 is that the candidate should be of 17 years of age on December 31 2021, i.e. the candidate should not have been born before 31st December 2004. There is no upper age limit and you can take part in the exam if you have studied Biology stream.

Here is the link of NEET 2021 article https://medicine.careers360.com/exams/neet

Hope this helps.