Correct option (b)
Explanation:
Let y = mx be any line represented by the equation
ax3 + bx2y + cxy2 + dy3 = 0
⇒ ax3 + bx2(mx) + cx(m2x2) + dm3x3 = 0
⇒ a + bm + cm2 + dm3 = 0 which is a cubic equation.
It represents three lines out of which two are perpendicular hence