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
Tumour antigen S-100 is present in 
Select and explain. 
A. Chorio carcinoma, B. Breast cancer, C. Neural tumours, D. Testicular tumours
C: Neural tumours
Answer: C: Neural tumours 
Explanation: None