A teacher asks three students to complete the following statement about the nature of the roots of a quadratic equation.
If `q^2 – 4pr > 0`, the roots of the quadratic equation `px^2 + qx + r = 0` will be............
Zain answers, "always positive".
Vipul answers, "positive, if p, q, and r are positive".
Suman answers, "negative, if p, q, and r are positive".
Who answered correctly?

Options

A. Zain
B. Vipul
C. Suman
D. None of them