This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cytotoxic Anticancer Drugs, Subject name: Pharmacology
Which of the following drug can cause Delayed Bone Marrow Suppression leading to Sustained Neutropenia? 
Select and explain. 
A. Vincristine, B. Carboplatin, C. Melphalan, D. Carmustine
D: Carmustine
Answer: D: Carmustine 
Explanation: NITROSOUREAS : MOA: Alkylating agent DRUGS: CARMUSTINE, LOMUSTINE, SEMUSTINE. USES: Can cross BBB thereby used in Brain tumors. S/E: Delayed Bone Marrow Suppression resulting in Sustained Neutropenia.