This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Embryology 2, Subject name: Anatomy
[{'content': 'A newborn has multiple congenital defects owing to dysgenesis of neural crest cells. Which of the following cells is most likely to be spared \nSelect and explain. \nA. Melanocytes, B. Motor neurons, C. Parafollicular cells, D. Spinal ganglion cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Motor neurons (option 2) develop from neural tube (Neural plate ectoderm), hence may not be affected in dysgenesis of neural crest cells (NCCs). Melanocytes (option 1) , Parafollicular cells (option 3) or spinal ganglion cells (option 4) are derived from NCCs, and are compromised in this scenario.', 'role': 'assistant'}]