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: Ophthalmology
Accommodation is due to 
Select and explain. 
A. Relaxation of ciliary muscles, B. Contraction of ciliary muscles, C. Contraction of dilator pupillae, D. None
B: Contraction of ciliary muscles
Answer: B: Contraction of ciliary muscles 
Explanation: Ans. Contraction of ciliary muscles