This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Which type of alkylating antineoplastic drug is Lomustine 
Select and explain. 
A. Nitrogen musturds, B. Nitrosoureas, C. Alkyl sulfonate, D. Triazine
B: Nitrosoureas
Answer: B: Nitrosoureas 
Explanation: ALKYLATING AGENTS 1)Nitrogen mustards:- Cyclophosphamide, Ifosfamide, Chlorambucil, Melphalan 2)Ethylenimine :- Thio-TEPA 3)Alkyl sulfonate :- Busulfan 4)Nitrosoureas:- Carmustine (BCNU), Lomustine (CCNU) , 5)Triazine :-Dacarbazine (DTIC), Temozolomide 6)Methylhydrazine :-Procarbazine Ref:- kd tripathi; pg num:-858