This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
Which of the following is not a neural crest derivative? 
Select and explain. 
A. Ciliary muscle, B. Melanocytes, C. Ciliary ganglion, D. Sphincter pupillae
D: Sphincter pupillae
Answer: D: Sphincter pupillae 
Explanation: Sphincter pupillae is derived from neurectoderm not mesenchyme or neural crest cell Neural Crest Derivatives: *Corneal Keratocytes *Ciliary muscles *Corneal stroma and endothelium (endothelial cells and keratocytes) *Pericytes of choroidal membranes *Melanocytes *Ciliary ganglion *Stroma of Iris and choroid Trabecular meshwork extraocular muscles are mesodermal in origin