What will come in the place of the question mark (?) in the following equation, if ’ + ’ and ’ - 'are interchanged and also ’ $$\times$$​ ’ and ’ $$\div$$​ ’ are interchanged?

​$$15 \div 3 - 10 \times 2 \div 18 \times 6 - 4 = ?$$​​​

if ’ + ’ and ’ - 'are interchanged and also ’ $$\times$$​​ ’ and ’ $$\div$$​​ ’ are interchanged?

then modified equation will become:

=15 × 3 + 10 ÷ 2 × 18 ÷ 6 + 4

=15 × 3 + 5 × 3 + 4

=45 + 15 + 4

Thus, Option B is the correct answer.