This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'In amyloidosis beta pleated sheet will be seen in \nSelect and explain. \nA. X Ray crystallography, B. Electron microscope, C. SPiral electron microscope, D. Congo red stain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Robbins 9/e p257 Beta pleated structure is seen on x Ray crystallography Election microscope shows non branching fibrils of indefinite length', 'role': 'assistant'}]