Concept:NCF 2005 envisions a mathematics classroom where students actively collaborate, explore multiple strategies, connect to real life, and where teachers view mistakes as learning opportunities.
Explanation:The vision includes students working in groups and seeking different problem-solving methods while relating to real-life situations. This matches option (a).
It also includes teachers reflecting on the learning process and treating mistakes as valuable learning tools, matching option (c).
Option (b) (solving only textbook exercises based on teacher’s examples) and option (d) (copying solutions from the board) do not align with the NCF vision.
Thus, the correct combination is (a) and (c).
Answer:C. (a) and (c)