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
[{'content': 'All the following are indications of intravenous iron administration , except \nSelect and explain. \nA. Intermittent gastrointestinal blood loss, B. Iron malabsorption, C. Inability to tolerate oral iron, D. Patients on erythropoietin therapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Harrison 19 th ed pg 629 Intravenous iron can be given to patients who are unable to tolerate oral iron; whose needs are relatively acute; or who need iron on an ongoing basis, usually due to persistent gastrointestinal blood loss. Parenteral iron use has been increasing rapidly in the last several years with the recognition that recombinant erythropoietin (EPO) therapy induces a large demand for iron--a demand that frequently cannot be met through the physiologic release of iron from RE sources or oral iron absorption.', 'role': 'assistant'}]