Which two numbers should be interchanged to make the given equation correct?
4 × 8 – 12 + 5 = 16

4 × 8 – 12 + 5 = 16
​$$\begin{array}{|c|c|} \hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[], {}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\\hline \text{Addition} &+ \\ \hline \text{Subtraction} & - \\\hline\end{array}$$​​

Let's check options:

Option A: interchange 8 and 5
4 × 5 – 12 + 8 = 16

20 – 12 + 8 = 16
28 –12 = 16
16 = 16 (Follow)​​

Thus, the correct option is: (a)