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': 'A patient has been diagnosed with depression who responds well to MAO inhibitors. Neurotransmitter which is deficient in this patient is produced from ____ \nSelect and explain. \nA. Raphe nucleus of Pons, B. Substantia Nigra, C. Locus Ceruleus, D. Hypothalamus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This patient with depression responds to MAO inhibitors. Hence neurotransmitter deficient is Norepinephrine which is produced by Locus Ceruleus.', 'role': 'assistant'}]