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
Melanocytes in conjunctiva are derived from ? 
Select and explain. 
A. Neural ectoderm, B. Surface ectoderm, C. Mesoderm, D. Neural crest
D: Neural crest
Answer: D: Neural crest 
Explanation: Ans. is 'd' i.e., Neural crest