According to National Curriculum Framework, 2005 discussions in a primary grade mathematics classroom should be

Correct option is C

The answer is (c) contextual and based on life-experiences of children.
The National Curriculum Framework (NCF) 2005 emphasizes that mathematics education in primary grades should be contextual and based on the life-experiences of children. This means that mathematics should be taught in a way that is relevant to children's everyday lives and that draws on their own experiences and interests. This approach helps children to make connections between mathematics and the world around them, which makes it more meaningful and engaging for them.