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': 'Marker for seminoma testis is - \nSelect and explain. \nA. Alfa - fetoprotein, B. Carcinoembryonic antigens, C. HCG, D. Acid phosphatase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Normally seminoma cells do not contain AFP and HCG.\n"Approximately 15% of seminomas contains syncytiotrophoblasts which secret HCG" \xa0------\xa0Robbin\'s 1042\nSeminoma is positive for placental alkaline phosphatase and keratin.', 'role': 'assistant'}]