Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
7 * 2 * 5* 4 * 2 * 15

Option (a) $$\div, −, +, \times, = $$

$$7\div2-5+4\times2 = 15$$

$$3.5-5+8 = 15$$

$$6.5\ne15$$

The given equation is not satisfied. So this is not the correct answer.

Option (b) $$−, \div, +, \times, = $$

$$7-2\div5+4\times2 = 15$$

$$7-0.4+8 = 15$$

$$14.6\ne15$$

The given equation is not satisfied. So this is not the correct answer.

Option (c) $$+, \times, −, \div, = $$

$$7+2\times5-4\div2 = 15$$

$$7+10-2 = 15$$

15 = 15

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

Option (d) $$\times, −, +, \div, = $$

$$7\times2-5+4\div2 = 15$$

$$14-5+2 = 15$$

$$11\ne15$$

The given equation is not satisfied. So this is not the correct answer.