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: Pharmacology
Alkylating agents are :  a) Vincristine b) Actinomycin–D  c) Chlorambucil d) 5–Fluorouracil e) Cyclophosphamide 
Select and explain. 
A. ab, B. ad, C. ae, D. ce
D: ce
Answer: D: ce 
Explanation: None