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
[{'content': 'Ciliary muscles develop It \nSelect and explain. \nA. Surface ectoderm, B. Neural crest cell, C. Mesoderm, D. Neuroectoderm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Neural crest cellGrays Anatomy 40/e p702, Ciliary muscles develop from Neural crest.', 'role': 'assistant'}]