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: Physiology
[{'content': 'Nerve growth factor is required for growth of ? \nSelect and explain. \nA. Sympathetic neurons, B. Brain, C. Motor neuron, D. y-neuron', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Sympathetic neuronsNerve growth factor (NGF) promotes growth of neurons, paicularly autonomic nervous system.Antiserum against NGF can be prepared and injection of this serum causes total destruction of sympathetic ganglia - immunosympathectomy.NGF is also required for growth of basal forebrain cholinergic neurons.", 'role': 'assistant'}]