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
[{'content': 'The iron preparation that can be given intravenously is ? \nSelect and explain. \nA. Ferrous sulphate, B. Iron dextran, C. Iron sorbitol citric acid complex, D. Colloidal ferric hydroxide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Iron dextran", 'role': 'assistant'}]