Commonest histological type of carcinoma testis is -: (A) Teratoma, (B) Yolk sac tumor, (C) Seminoma, (D) Choriocarcinoma
Answer is C. Tumors of the testis are a heterogeneous group of neoplasms that include germ cell tumors and sex cord stromal tumors. 
In postpubertal males, 95% of testicular tumors arise from germ cells, and all are malignant