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': 'Thyroxine causes all the following except: \nSelect and explain. \nA. Decreased cell metabolism, B. Increased oxygen consumption, C. Increased pulmonary ventilation, D. Increased basal metabolism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]