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': 'Tumour antigen S-100 is present in \nSelect and explain. \nA. Chorio carcinoma, B. Breast cancer, C. Neural tumours, D. Testicular tumours', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]