Correct option is A
The correct answer is (a). Both (A) and (R) are true and (R) is the correct reason of (A).
Mathematics curriculum should be ambitious to foster a deep understanding of mathematical concepts, develop problem-solving skills, and nurture mathematical reasoning abilities. This aligns with the aim of developing the child's inner resources to think and reason mathematically. Therefore, Reason (R) is the correct explanation for Assertion (A).