Hello

Ntse eligibility criteria for stage 1 i.e state level:

Students studying in class 10th from recognised boards can be eligible for the exam .

Some state also set 9th marks as a eligibility criteria and it is different in different states

For General category it is in between 50 to 70%.

Since your studying in 10th so you are eligible for the same.

You can also visit the following link to know the eligibility criteria for stage 2 and more..

https://www.google.com/amp/s/school.careers360.com/articles/ntse-eligibility-criteria/amp

Feel free to ask

Good Luck...