<prompt> Commonest histological type of carcinoma testis is -TeratomaYolk sac tumorSeminomaChoriocarcinoma  <response>: 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 