Solution:
It is given that does not have two distinct real roots.Discriminant is given by .
Here are the relations between roots and discriminant
● When roots are non-real, the discriminant is less than 0
● When roots are real and equal, the discriminant is equal to 0
● When the roots real and unequal the discriminant is greater than 0
We substitute to obtain .
Since, the equation does not have real distinct roots.
Therefore,
Above quadratic equation has real roots.
Therefore, Hence, the correct option is 4.