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: Surgery
A drug not effective in Multiple Myeloma is? 
Select and explain. 
A. Boezomib, B. Hydroxyurea, C. Melphalan, D. Cylcophosphamide
B: Hydroxyurea
Answer: B: Hydroxyurea 
Explanation: Hydroxyurea REF: Harrison 17th ed chapter 106 Drugs used in chemotherapy of multiple myeloma are: Melphan Thalidomide Lenalidomide Cyclophosphamide Vincristine Doxorubicin (Adriamycin) and liposomal doxorubici