This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasia, Subject name: Radiology
Most radiosensitive tumor of the following is? 
Select and explain. 
A. Dysgerminoma, B. Renal cell carcinoma, C. Melanoma, D. Thyroid carcinoma
A: Dysgerminoma
Answer: A: Dysgerminoma 
Explanation: ANSWER: (A) DysgerminomaREF: Rozer's radiotherapy 3rd e table 11.3RADIOSENSITIVITY OF DIFFERENT TUMORSHighly radiosensitive* Ewings* Seminoma* Lymphoma* Wilms* Multiple myelomaModerately* Nasopharyngeal* Dysgerminoma* Medulloblastoma* Small cell ca* Teratoma* Breast ca* Ovarian ca* Basal cell caRelatively resistant* Renal cell ca* Rectal ca* Colonic ca* Ca cxHighly resistant* Hepatoma* Pancreatic ca* Osteosarcoma* Melanoma