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
[{'content': 'Sphincter and dilator pupillae muscles are derived embryologically from the: \nSelect and explain. \nA. Surface ectoderm, B. Mesoderm, C. Neuroectoderm, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Neuroectoderm', 'role': 'assistant'}]