Step 1: Understanding the purpose of NIOS.
NIOS primarily caters to children who are not enrolled in the formal schooling system, providing opportunities for education through open and distance learning methods.
Step 2: Why other options are incorrect.
- (A) "Who are informal schooling" is not a correct description of NIOS services.
- (C) "With disabilities" is not the primary focus of NIOS, though it does serve individuals with special needs.
- (D) "From deprived sections" is also incorrect as NIOS is not specifically focused on only deprived sections.
Step 3: Conclusion.
The correct answer is that NIOS serves children who are outside the school system, offering them flexible learning opportunities.
Final Answer: who are outside the school.