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
[{'content': 'Which of the following iron therapy is associated with highest risk of anaphylasis? \nSelect and explain. \nA. Ferric carboxy maltose, B. Iron dextran, C. Ferrous sulphate, D. Ferrous Fumarate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anaphylasis is common with Iron dextran.', 'role': 'assistant'}]