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: Pathology
[{'content': 'The chemical nature of the amyloid deposited in immunocyte dyscrasias with amyloidosis is \nSelect and explain. \nA. Serum amyloid A (SAA), B. Immunoglobulin light chain (AL amyloid), C. Prealbumin, D. Beta 2 microglobulin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]