Hii,

Currently, he is not eligible for the NTSE exam as this exam is conducted for class 10 students. But, he will be able to appear this exam in 10th class. For more information, you can check NTSE Eligibility Criteria .
Now he can start his preparation to ace the exam.

All the best!!!

Hey Vijeta!

Your brother is not eligible for giving NTSE exam when he is in 9th standard. He will only be eligible in 10th standard provided that he scores a minjmum of 60%(5% relaxation for reserved candidates) in the 9th standard . And he should be less than 18 years as on july 1st of the year of exam .

To check the full eligibility criteria for both yhe rounds of exams ,follow the given link :

https://school.careers360.com/articles/ntse-eligibility-criteria

Hope it helps!