This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy, Subject name: Radiology
The most radio sensitive tumor amongst the following is: 
Select and explain. 
A. Small cell lung cancer, B. Seminoma, C. Soft tissue sarcoma, D. Osteosarcoma
B: Seminoma
Answer: B: Seminoma 
Explanation: Ans. (b) SeminomaRef: Devita Th/1907* Most radiosensitive tumor: HL > Ewings* Most radiosensitive tumor of head and Neck: Nasopharyngeal CA > Glottic CARadiosensitivity of tumorsHighly sensitiveModerate sensitiveRelatively ResistantHighly Resistant# Ewing's sarcoma# Lymphoma# Wilms tumor# Multiple Myeloma# Seminoma# Nasopharyngeal CA# Dysgerminoma# Medulloblastoma# Small Cell Cancer lung# Breast Cancer# Ovarian Cancer# Basal cell cancer# Nasopharyngeal Cancer# Dysgerminoma# Small Cell Cancer lung# Breast Cancer# Ovarian Cancer# Basal cell cancer# Renal cell CA# Rectal/ colon cancer# Bladder Carcinoma# Soft tissue sarcoma Squamous cell carcinoma of lung# Cervix cancer# Hepatoma# Melanoma# Pancreatic cancer# Osteosarcoma