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': 'Migratory superficial thrombophlebitis is seen in - \nSelect and explain. \nA. Carcinoma pancreas, B. Astrocytoma, C. Renal carcinoma, D. All', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Carcinoma pancreas", 'role': 'assistant'}]