Concept:Inclusive education ensures that students with disabilities are placed in regular classrooms without discrimination or barriers.Explanation:Inclusive education promotes equal opportunities for all children, including those with disabilities. It requires removing physical and social barriers, providing accessible infrastructure, and treating every student with respect. The core requirement is non-discrimination – meaning no student is excluded or treated unfairly because of their disability. This philosophy emphasizes equity, diverse teaching strategies, and a barrier-free environment. Options like inaccessible infrastructure, inequality, and barriers contradict inclusion. Thus, inclusion demands non-discrimination as its fundamental principle.Answer:D. Non-discrimination