If $ means +, @ means ×, # means -, and * means ÷, then what is the value of :

5 @ 20 * 4 $ 6 # 30 = ?

If $ means +, @ means ×, # means -, and * means ÷,
$ = +, @ = ×, # = −, * = ÷

​$$\begin{array}{|c|c|} \hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\\hline \end{array}$$​​
Expression:
5 @ 20 * 4 $ 6 # 30
Replace the symbols
? = 5 × 20 ÷ 4 + 6 − 30

? = 5 × 5 + 6 − 30

? = 25 + 6 − 30

? = 31 − 30

Thus, correct option is (a).