Indicate whether the given structure is more involved with hearing or equilibrium:
A. Pinnacle
B. Cochlear nerve
C. Otolithic membrane
D. Vestibule
E. Pharyngotympanic tube
F. Stapes
G. Tensor tympani muscle
H. Helicotrema
I. Maculae
J. Basilar membrane
K. Round window
L. Cristae
M. Semicircular canals
N. Spiral organ
O. Saccule
P. Utricle
Q. Cochlea
R. Vestibular nerve
S. Cupulae
