This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'A diabetic patient is undergoing dialysis. Aspiration done around the knee joint would show \nSelect and explain. \nA. A beta 2 microglobulin, B. AA, C. AL, D. Lactoferrin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ClinicoPathologic Category Associated diseases Major Fibril protein Related precursor protein SYSTEMIC AMYLOIDOSIS Immunocyte dyscrasias with amyloidosis (primary) Multiple myeloma AL Ig light chain, l Reactive systemic amyloidosis (secondary) c/c inflammation AA SAA Hemodialysis-associated CRF Ab2m B2-microglobulin Hereditary amyloidosis AA or ATTR SAA or Transthyretin Systemic senile amyloidosis ATTR Transthyretin LOCALIZED AMYLOIDOSIS Senile cerebral Alzheimer Ab APP Endocrine Medullary ca thyroid Islets of Langerhans Type 2 DM A Cal AIAPP Calcitonin Islet amyloid peptide Isolated atrial amyloidosis AANF Atrial natriuretic factor', 'role': 'assistant'}]