JEE Mains 2020 Model Paper 1 New Pattern

PN is an ordinate of the parabola y2 = 4ax (P on y2 = 4ax and N on x - axis). A straight line is drawn parallel to the axis to bisect NP and meets the curve in Q. NQ meets the tangent at the vertex A in a point T such that AT - kNP, then the value of k is (where A is the vertex)