​Which two mathematical operators should be interchanged to make the given equation correct?

$$18 × 6 + 12 - 7 ÷ 2 = 1$$​

18 × 6 + 12 ÷ 7 - 2=1

18 × 6 + 1.71 - 2=1

108 + 1.71 - 2=1

109.71 - 2=1

107.71≠1

18 ÷ 6 + 12 - 7 × 2 = 1

3 + 12 - 7 × 2 =1

3 + 12 - 14 =1

15-14=1

18 + 6 × 12 - 7 ÷ 2 = 1

18 + 6 × 12 - 3.5 = 1

18 + 72 - 3.5 =1

90 - 3.5 = 1

86.5 ≠1

18 × 6 - 12 + 7 ÷ 2 = 1

18 × 6 - 12 + 3.5 =1

108 - 12 + 3.5 = 1

111.5 - 12 = 1

99.5 ≠ 1

Thus, Option B is the correct answer.