If the discriminant of the quadratic equation, ax² + bx + c = 0, a ≠ 0 is greater than zero and a perfect square and a, b, c are rational, then the roots are:

1. rational and equal

2. irrational and unequal

3. irrational and equal

4. rational and unequal

We know that,

If the Discriminant is greater than 0 and a perfect square and a, b, c are rational, then the roots are rational and unequal.

Hence, option 4 is the correct option.