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
Horizontal semicircular canal responds to 
Select and explain. 
A. Horizontal acceleration, B. Rotational acceleration, C. Gravity, D. Antero-posterior acceleration
B: Rotational acceleration
Answer: B: Rotational acceleration 
Explanation: The three canals lie at right angles to each other but the one which lies at right angles to the axis of rotation is stimulated the most.Thus horizontal canal will respond maximum to the rotation on the veical axis. (Ref: Diseases of EAR, NOSE and THROAT by PL Dhingra; 6th edition; page no.17)