Correct option is A
Given,
312 – 13 × 14 + 207 ÷ 4 = 539
As per the question interchanging sings ÷ and – and apply BODMAS rule-
312 ÷ 13 × 14 + 207 - 4 = 539
24 × 14 + 207 - 4 = 539
336 + 207 - 4 = 539
543 - 4 = 539
539 = 539
Therefore, the correct answer is (a).