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: Pharmacology
Indication for intramuscular iron therapy is : 
Select and explain. 
A. Pregnancy, B. Postpartum period, C. Emergency surgery, D. Oral iron intolerance
D: Oral iron intolerance
Answer: D: Oral iron intolerance 
Explanation: None