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': '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: Ans. is 'a' i.e. X-ray crystallography", 'role': 'assistant'}]