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
Radioprotective drug is – 
Select and explain. 
A. Paclitaxem, B. Vincristine, C. Amifostine, D. Etoposide
C: Amifostine
Answer: C: Amifostine 
Explanation: Amifostine (WR - 2721) is one of today's most widely studied radioprotector.