The condition that the parabola $y^{2} = 4c(x - d)$ and $y^{2} = 4ax$ have a common normal other than $x$-axis $(a 0,\ c 0),$ if

Question

The condition that the parabola $y^{2} = 4c(x - d)$ and $y^{2} = 4ax$ have a common normal other than $x$-axis $(a > 0,\ c > 0),$ if

Dr. Abubacker · Accepted Answer

The correct answer is Option C: $2d < 2a + c$.