Answer
(b)
Work Step by Step
Earthquakes typically occur in the lithosphere, the rigid outer layer of Earth, not the asthenosphere.
The asthenosphere is a semi-fluid layer beneath the lithosphere where rocks are more ductile and less likely to fracture suddenly.
Fault ruptures and seismic activity happen in the brittle lithosphere, where stress builds and is released as earthquakes.
Hence it is not true that earthquakes occur when rocks of the asthenosphere rupture along a fault.
The answer is (b).
