This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'In the case of carcinoma breast with Her -2 neu immunohistochemistry staining, which of the following score needs fuher FISH study? \nSelect and explain. \nA. 0, B. 1+, C. 2+, D. 3+', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]