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 accepted nomenclature of amyloidosis is AX. What stands for A and X: \nSelect and explain. \nA. A-Amyloid X protein in the fibril, B. A- Amyloid X- beta pleated structure, C. A-Amyloid X- helical structure, D. A- Amyloid X -birefringent', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Amyloid diseases are classified according to whether they are systemic or localized, acquired or inherited. The accepted nomenclature is AX A indicates amyloidosis X represents the protein in the fibril. Ref: Harrison, Edition-18, Page-942.', 'role': 'assistant'}]