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': 'Antitopoismerase I is mark of- \nSelect and explain. \nA. Systemic sclerosis, B. Classic Polyaeritis nodosa, C. Nephrotic syndrome, D. Rheumatoid ahritis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Systemic sclerosis", 'role': 'assistant'}]