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 horizontal semicircular canal causes nystagmus in which directions - 
Select and explain. 
A. Vertical, B. Horizontal, C. Rotary, D. Any of thethree
B: Horizontal
Answer: B: Horizontal 
Explanation: Ans. is 'b' i.e., Horizontalo The cupulae of the semicircular canals are stimulated by movement of endolymphatic fluid and each canal causes the nystagmus in its own planeStimulation of horizontal SCC - Horizontal nystagmus.Stimulation of superior SCC - Rotary nystagmus.Stimulation of vertical SCC - Vertical nystagmus