This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Stimulation of posterior semicircular canal produces 
Select and explain. 
A. Horizontal nystagmus, B. Veical nystagmus, C. Rotatory nystagmus, D. All of the above
B: Veical nystagmus
Answer: B: Veical nystagmus 
Explanation: Stimulation of semicircular canal produces nystagmus and the direction of nystagmus is determined by the plane of the canal being stimulated. Thus nystagmus is veical from the posterior canal. (Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition)