Which two signs need to be interchanged to make the following equation correct?
$$9 + 3 − 4 \div 5 \times 2 = 9$$

Option (a) − and $$\times$$

$$9 + 3 \times 4 \div 5 - 2 = 9$$

The given equation is not satisfied. Because it will give values in fractions. So this is not the correct answer.
Option (b) + and $$\times$$

$$9 \times 3 − 4 \div 5 + 2 = 9$$

The given equation is not satisfied. Because it will give values in fractions. So this is not the correct answer.

Option (c) + and $$\div$$

$$9 \div 3 − 4 + 5 \times 2 = 9$$

$$3−4+10=9$$

9=9

The given equation is satisfied. So this is the correct answer.

Option (d) − and +

$$9 − 3 + 4 \div 5 \times 2 = 9$$

The given equation is not satisfied. Because it will give values in fractions. So this is not the correct answer.