If '#' means '÷', '$' means '+', '@' means '−' and '&' means '×', then what will come in place of the question mark (?) in the following equation?
12 $ 10 # 5 @ 2 & 6 # 3 = ?

Given: 12 $ 10 # 5 @ 2 & 6 # 3 = ?

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: 12 + 10 $$\div$$​ 5 - 2 $$\times$$​ 6 $$\div$$​ 3 = ?

12 + 2 - 2 $$\times$$ 2 = ?

12 + 2 - 4 = ?

14 - 4 = ?

? = 10

Thus, correct option is (a).