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
Not a radiosensitizing drug ? 
Select and explain. 
A. 5-Fu, B. BUDR, C. Cyclophosphamide, D. Hydroxyrea
C: Cyclophosphamide
Answer: C: Cyclophosphamide 
Explanation: Ans. is'c'i.e., Cyclophosphamide lRef. Cancer nursing: Principles & practice p. 256Clsplatin and 5-FU - Most common radiosensitive drugs.