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: Surgery
[{'content': "About Mondor's disease -a) Superficial thrombophlebitisb) Lymphatic infiltration tumour cellc) Cord like apperance of subcutanous veinsd) Occurs all over the body \nSelect and explain. \nA. ac, B. bc, C. ad, D. b", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]