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: Medicine
[{'content': 'Plasma ferritin levels may be reduced in all of the following conditions, except - \nSelect and explain. \nA. Iron deficiency, B. Vitamin C deficeincy, C. Liver disease, D. Hypothyroidism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]