This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inner Ear, Subject name: ENT
All are required for balancing EXCEPT: 
Select and explain. 
A. Visual system, B. Olfactory system, C. Proprioception, D. Vestibule and cochlea
B: Olfactory system
Answer: B: Olfactory system 
Explanation: Ans. (b) Olfactory systemRef: Dhingra's ENT 5th ed. / 22* Requirements for balancing:# Vision# Vestibule and cochlea# Proprioception# Cerebellum