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': 'All are derivatives of ectoderm except- \nSelect and explain. \nA. epidermis, B. parotid gland, C. neuro hypophysis, D. arrector pilorum', 'role': 'user'}, {'content': "Answer: D \nExplanation: Surface ectoderm derivatives:- Epithelium and glands skin epithelium sweat glands, sebaceous glands Myoepitheliocytes of skin glands Any external opening oral opening Rathke's pouch (Most of the Pituitary gland) salivary glands parotid, submandibular, sublingual glands Neural plate ectoderm derivatives Iris muscles- sphincter and dilator pupillae CNS neurohypophysis Neurohypophysis(Posterior pituitary gland)", 'role': 'assistant'}]