Correct answer: B. Gaze-evoked nystagmus
Why:
The cerebellum (especially vestibulocerebellum: flocculonodular lobe) coordinates eye movements and balance.
Lesions disrupt control of ocular fixation → eyes drift when looking to the side → corrective jerks = gaze-evoked nystagmus.
Why others are wrong:
A. No nystagmus → incorrect; cerebellar lesions commonly cause nystagmus
C. Pure hearing loss → cochlear/8th nerve pathology, not cerebellum
D. Miosis → autonomic pathway issue (Horner syndrome), not cerebellum