A 28 Year Old Man Sees His GP About a 2

A 28 year old man sees his GP about a 2 cm firm mass in his right testis.The GP examines it and recommends immediate removal of the tumour.The testis and spermatic cord are surgically removed shortly thereafter,and a representative section of the tumour is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?

A) Embryonal carcinoma
B) Immature teratoma
C) Seminoma
D) Torsion of the testis
E) Yolk sac tumour