This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Which of the following findings is diagnostic of iron deficiency anemia? \nSelect and explain. \nA. Increased TIBC, decreased serum ferritin, B. Decreased TIBC, decreased serum ferritin, C. Increased TIBC, increased serum ferritin, D. Decreased TIBC, increased serum ferritin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Iron deficiency anemia is associated with increased Total iron binding capacity (TIBC) and decreased serum ferritin ( storage form of iron) This happens vice versa in IDA due to secondary infection like CKD. REF: Harrison book of internal medicine 21ST EDITION', 'role': 'assistant'}]