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
Schiller - Duval bodies are seen in- 
Select and explain. 
A. Teratoma, B. Seminoma, C. Yolk sac tumour, D. Chorio - carcinoma
C: Yolk sac tumour
Answer: C: Yolk sac tumour 
Explanation: Yolk sac tumor (endodermal sinus tumor or infantile embryonal carcinoma) → Schiller - Duval bodies.
Leydig (interstitial) cell tumor → Reinke crystalloids.
	Note : - Rienke crystals are also seen in the hilus cell tumor of ovary.