Select the correct combination of mathematical signs that can sequentially replace * to balance the following equation.
20*4*6*2*14*18

​20*4*6*2*14*18   

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

By option (a): putting the sign equation will be 

20 ÷ 4 × 6 = 2 + 14 + 18

5 × 6 = 16 + 18

$$30 \not= 34$$ 

By option (b): putting the sign in the equation will be 

20 + 4 =  6  ÷ 2  × 14 + 18

24 = 3 × 14 + 18

24 = 42 + 18

​$$24 \not= 60$$

By option (c):putting the sign equation will be 

20  ÷ 4 ×  6 - 2 = 14 × 18

5 × 6 - 2 = 252

$$28\not=252$$​  

By option (d):( ÷,×,+,=,+ )putting the sign equation will be 

20 ÷ 4 × 6 + 2 = 14 + 18

$$5\times6+2=32\\ \ \\30+2= 32\\ \ \\32=32$$​​

Thus, correction is (d).