Correct Option (A)
Assumption 1 is valid. The passage explicitly states, "Teacher accountability systems and processes must ensure that children are learning, and that their right to learn in a child-friendly environment is not violated." This directly supports the inference that the Right to Education, as discussed, guarantees teachers' accountability for the learning process of children.
Incorrect Options:
Assumption 2 is not valid. The passage notes that providing schooling facilities is insufficient and that efforts must address factors preventing children from attending or dropping out. It advocates for ensuring children attend and complete elementary education but does not claim that the Right to Education guarantees 100% enrolment. The emphasis is on overcoming barriers to participation and ensuring quality, not on a guaranteed enrolment figure.
Assumption 3 is not valid. The passage focuses on the challenges and requirements for achieving universal, quality education, including issues of access, participation, curriculum, and teacher accountability. There is no discussion or implication within the text regarding the concept of a "demographic dividend" or its utilization. This assumption introduces a concept not addressed by the passage.