Q. Number of common tangents to the parabola $y^{2} = 4ax$ and $x^{2} = 4by$ is
A) 4
B) 3
C) 2
D) 1
Explanation
(d)
It is clear from the figure, that only one common tangent is possible
[image:11_image16.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.