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
[{'content': 'Commonest histological type of carcinoma testis is - \nSelect and explain. \nA. Teratoma, B. Yolk sac tumor, C. Seminoma, D. Choriocarcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tumors of the testis are a heterogeneous group of neoplasms that include germ cell tumors and sex cord stromal tumors. \nIn postpubertal males, 95% of testicular tumors arise from germ cells, and all are malignant', 'role': 'assistant'}]