Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.

12 * 5 * 9 * 54 * 9 = 1

Given: 12 * 5 * 9 * 54 * 9 = 1

Logic: interchange * with mathematical operators and solve as per BODMAS rule.

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

12 * 5 * 9 * 54 * 9 = 1

After interchanging,

12 × 5 × 9 ÷ 54 - 9 = 1

10 - 9 = 1

12 * 5 * 9 * 54 * 9 = 1

After interchanging,

12 + 5 × 9 ÷ 54 - 9 = 1

12 + 5 ÷ 6 - 9 = 1

Here, 5 is perfectly not divisible by 6.

So, its not correct option.

12 * 5 * 9 * 54 * 9 = 1

After interchanging,

12 * 5 * 9 * 54 * 9 = 1

So, its not correct option.

12 * 5 * 9 * 54 * 9 = 1

After interchanging,

12 × 5 × 9 - 54 - 9 = 1

540-63=1

477≠1

So, its not correct option.