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
Otoconia is related to 
Select and explain. 
A. Hearing, B. Balance, C. Smell, D. Taste
B: Balance
Answer: B: Balance 
Explanation: Otoconia are bio-crystals which couple mechanic forces to the sensory hair cells in the utricle and saccule, a process essential for us to sense linear acceleration and gravity for the purpose of maintaining bodily balance. In fish, structurally similar bio-crystals called otoliths mediate balance Ref : Internet sources.