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: Anatomy
Ciliary muscles develop It 
Select and explain. 
A. Surface ectoderm, B. Neural crest cell, C. Mesoderm, D. Neuroectoderm
B: Neural crest cell
Answer: B: Neural crest cell 
Explanation: Ans. b. Neural crest cellGrays Anatomy 40/e p702, Ciliary muscles develop from Neural crest.