This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': '40 yr old male presented with cirrhosis. Special stain used here is \nSelect and explain. \nA. Alcian blue, B. Perls Prussian blue, C. Masson Fontana, D. Von kossa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]