A normal at any point (x, y) to the curve y = f(x) cuts a triangle of unit area with the axis, the differential equation of the curve is (a) y-x 4 dy x-ydydy dx

A normal at any point (X, y) to the curve y = f(X) cuts a triangle of unit area with the axis, the differential equation of the curve is (A) y-x 4 dy x-ydydy dx (B) dx dx dy X+y = y dx (D) None of these (C)