If ‘A’ stands for ‘÷’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘–’, what will come in place of the question mark (?) in the following equation?
23 B 4 C 2 D 16 A 4 = ?

Given: 23 B 4 C 2 D 16 A 4 = ?

Given equation is solve by BODMAS rule.

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

New equation: 23 $$\times$$ 4 + 2 - 16 $$\div$$​ 4 = ?

23 $$\times$$ 4 + 2 - 4 = ?​

92 + 2 - 4 = ?

94 - 4 = ?

? = 90

Thus, correct option is (a).