​If the signs + and × are interchanged, and the numbers 3 and 7 are also interchanged, which of the following four equations given as options would be correct?

Given: signs + and × are interchanged, and the numbers 3 and 7 are also interchanged.

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

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

3+7×9=30

After interchanging,

7×3+9=30

21+9=30

16×3+7=39

After interchanging,

16+7×3=39

16+21=39

37≠39

So, its not correct option.

14+3×7=35

After interchanging,

14×7+3=35

98+3=35

101≠35

So, its not correct option.

13+7×3=47

After interchanging,

13×3+7=47

39+7=47

46≠47

So, its not correct option.