This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'Schiller-Duval bodies are seen in- \nSelect and explain. \nA. Teratoma, B. Seminoma, C. Yolk sac tumour, D. Chorio Carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Yolk sac tumor of the testis: Raised a-fetoprotein level (AFP). Schiller-Duval bodies. Schiller-Duval body: It is the characteristic feature of the endodermal sinus tumor. This is a glomerulus-like structure composed of a central blood vessel enveloped by germ cells within a space lined by germ cells. Endodermal sinus tumor: 1. Schiller-Duval body 2. PAS-positive hyaline droplets Ref: RAM DAS NAYAK EXAM PREPARATORY MANUAL FOR UNDERGRADUATES 2nd ed. pg no: 684', 'role': 'assistant'}]