Question

Define N.I.O.S ??????​

Answer 1

${\underline{\sf \green{Answer:-}} }$

National Institute of Open Schooling

Answer 2

The National Institute of Open Schooling (NIOS), formerly National Open School (name changed in 2002), is the board of education under the Union Government of India. ... The NIOS is a national board that administers examinations for Secondary and Senior Secondary examinations similar to the CBSE and the CISCE.

its headquarters are in noida