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: Radiology
Which of the following respond best to radiotherapy? 
Select and explain. 
A. Seminoma, B. Teratoma, C. Choriocarcinoma, D. Endometrial carcinoma
A: Seminoma
Answer: A: Seminoma 
Explanation: Ans. Seminoma