Sir how can we apply for NTSE exam?And what is the criteria for this NTSE exam?

NTSE exam is given by class tenth students. It has 2 stages. First is state level exam which will be held in November 2018 and the second is at All India level in May 2019. Forms will be available in August 2018. Syllabus includes class 9 and 10 subjects and Mental ability test.
for more info refer this link:
https://www.askiitians.com/ntse/
We at Askiitians prepare students for all olympiad exams.