This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Connexin 26 mutation is associated with: 
Select and explain. 
A. Deafness, B. Anosmia, C. Seizures, D. None of the above
A: Deafness
Answer: A: Deafness 
Explanation: Among the genes associated with human deafness, GJB2 encoding for connexin 26 is significant for being associated with nearly 20% childhood deafness.