What will come in place of the question mark (?) in the following equation, if ‘+’and ‘–’ are interchanged and also ‘×’ and ‘÷’ are interchanged?

10 ÷ 5 + 144 × 12 + 13 – 45 × 9 + 12 = ?

Given:   ‘+’and ‘–’ are interchanged and also ‘×’ and ‘÷’ are interchanged.

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

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

10 ÷ 5 + 144 × 12 + 13 – 45 × 9 + 12

After interchanging,

10 × 5 - 144 ÷ 12 - 13 + 45 ÷ 9 – 12

=50 - 12 - 13 + 5 – 12

=55-37

Thus, correct option is (a).