If A means +, B means-, Z means $$\div$$ and C means × , then
10C2A5B5?

10C2A5B5?

​$$\begin{array}{|c|c|} \hline \textbf{Operation preference wise} & \textbf{Symbol} \\\hline \text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\\hline \end{array}$$​​

After change sign

10×2+5-5

= 20

Thus, the correct answer is (d).