The nature of roots can help us to determine the answer to this question and discriminant can be used to determine the nature of the roots.
Discriminant = b² - 4ac
b = coefficient of x term = -9
a = coefficient of squared term = 4
c = constant term = 9
So, Discriminant = 81 - 4(4)(9) = -63
Since, the discriminant is negative, the equation will have complex zeros.This means its graph will not cross x-axis at any point.
So, the answer to this question is zero, option B