Which two signs and numbers need to be interchanged to make the following equation correct?

(7)² – (56 ÷ 8) + (9 × 6) = 18

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

(7)² – (56 ÷ 8) + (9 × 6) = 18

After interchanging,

(7)² – (56 + 6) ÷ (9 × 8) = 18

or, 49 – 62÷72 $$\not=$$​ 18

as we know 62 is perfectly not divisible by 72, so it will result in decimal.

So, its not correct option.

(7)² – (56 ÷ 8) + (9 × 6) = 18

After interchanging,

(6)² + (56 ÷ 8) - (9 × 7) = 18

or, 36 + 7 - 63 = 18

or, -20$$\not=$$​18

So, its not correct option.

(7)² – (56 ÷ 8) + (9 × 6) = 18

After interchanging,

(9)² + (56 ÷ 8) - (7 × 6) = 18

or, 81 + 56 - 42 = 18

or, 95$$\not=$$​18

So, its not correct option.​

(7)² – (56 ÷ 8) + (9 × 6) = 18

After interchanging,

(8)² + (56 ÷ 7) - (9 × 6) = 18

Or, 64+8-54=18

Thus,  correct option is (d).