This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
Which of the following is true about anemia of chronic disease 
Select and explain. 
A. Increased TIBC, B. Normal serum iron levels, C. Normal or increased serum ferritin, D. Increased transferrin saturation
C: Normal or increased serum ferritin
Answer: C: Normal or increased serum ferritin 
Explanation: Ref Harrison 19 th ed pg 628 AI is normo- cytic and normochromic. The iron values usually make the differential diagnosis clear, as the ferritin level is normal or increased and the percent transferrin saturation and TIBC are typically below normal.