Answer: Option (B)
Explanation: The seismic waves namely P and S-waves travels through the interior of the earth, and P-waves propagates faster than S-waves. Both P and S waves undergoes reflection and refraction method.
When P-wave propagates through the mantle, due to its high velocity, it gets bend outward. This waves then reaches the core-mantle boundary, where the P-waves gets refracted inward through the outer core because of the increasing density. P waves can travel both in solid as well as liquid.
It is same in case of S-waves also, but it is comparatively slower than the P-wave, and this wave decreases with the increasing density and gets completely absorbed as they reach the outer core. S waves can travel only in solids.
This seismic waves when recorded on the seismograph during an earthquake, it depicts the changes that happens on the core-mantle boundary. So this data suggests that the waves undergoes bending at the outer core.
Thus, the correct answer is option (B).
