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
Total iron binding capacity is increased in 
Select and explain. 
A. Iron deficiency anaemia, B. Anaemia of chronic disease, C. Sideroblastic anaemia, D. β - thala ssemia
A: Iron deficiency anaemia
Answer: A: Iron deficiency anaemia 
Explanation: Iron deficiency anaemia.
Serum  ↓.
Serum ferritin ↓.
TIBC ↑.