<prompt> Which of the following findings is diagnostic of iron deficiency anemia?Increased TIBC, decreased serum ferritinDecreased TIBC, decreased serum ferritinIncreased TIBC, increased serum ferritinDecreased TIBC, increased serum ferritin  <response>: 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 