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': 'Melatonin is secreted by parenchymal cells of pineal gland. Fever causes: \nSelect and explain. \nA. Thermoregulatory centre to shift to new level, B. Resetting of skin temperature, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thermoregulatory centre to shift to new level', 'role': 'assistant'}]