Sir, I want to know  delhi state open school board (dsos) valid or not, if someone know please tell me I'm waiting

Hi Sudhir!

Yes, Delhi State Open School is a recognised board which is vaild all-over India and is equivalent to any other state/national/private board. Also, it has been mentioned in the COBSE list of recognized boards, which you can check here:

https://www.cobse.org.in/recognized-educational-boards-list/

To know more about Delhi State Open School, visit here:

https://www.dsos.co.in/

Thankyou!