Dear aspirant,

As you have mentioned that you have passed your 12th std from a private school and considering you have given your 12th from cbse board and you haven't passed it.

So, I would suggest you to write the name of that private school from which you passed or if that private school is affiliated to some cbse board school then you can also the write the name of that school.

For more information you can check out the link given below:-

https://medicine.careers360.com/articles/neet-eligibility-criteria