Hi Sanjay,

I would suggest you to go for NIOS as it the national level Open schooling but if you are looking for open school in Delhi then you can go for:-

1-Vidya Jyoti Patrachar School.

There are lots of schools who offers Open Schooling but for the information you have contact some agents of if you don't want to do that then you should go for the above mentioned 2 open schools.

Hope this will help,please feel free to ask if you have any further queries.

Thank You.