Hi Kunal!

No, Jharkhand State Open School (JSOS) is not considered to be a recognised board. The Allahabad High Court found JSOS to be fictitious and the certificates which they provide for 10th and 12th are not legitimate. So, if you get a certificate from JSOS, you will not be considered for admission in Degree Courses by the Universities!

Hope this is helpful!

All the best!