This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis and scrotum, Subject name: Surgery
[{'content': 'Placental alkaline phosphates is marker of: \nSelect and explain. \nA. Theca cell tumour, B. Teratoma, C. Choriocarcinoma, D. Seminoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: PLAP-most useful marker for bulk disease. Tumour marker for seminoma is PLAP. BETA HCG is also raised in 5-10% of pure seminomas as they contain syncytiotrophoblast like giant cells.', 'role': 'assistant'}]